A bank charges a fee if your account balance falls below $50.
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A bank charges a fee if your account balance falls below $50.
Let b represent the account balance. Write an inequality to describe when a bank would charge a fee. How many solutions does this inequality have and why?
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Decision Analysis Question
It contains 5 different problems, and total number of questions/parts is around 16. All Multiple Choice questions. I got s ...
Decision Analysis Question
It contains 5 different problems, and total number of questions/parts is around 16. All Multiple Choice questions. I got some examples below.
GWU Hill Running Regression Worksheet
data in csv format , will give later.Hill running is a long-standing Scottish tradition, dating back to 1040. The races ta ...
GWU Hill Running Regression Worksheet
data in csv format , will give later.Hill running is a long-standing Scottish tradition, dating back to 1040. The races take place at various times of year throughout Scotland. The data set (scottish_hill_races.csv) posted on Blackboard contains recent information from 90 races regarding Distance (in kilometers), Climb (in meters), Time (record time in minutes), and Sex (1 for women and 0 for men).a) Find the equation of the estimated simple linear regression function that predicts Time based on Distance.b) Plot the data with regression function found in part a). Distinguish between data points for Women and data points for Men and include a key (legend).c) Now fit the first-order regression model that predicts Time based on Distance and Sex. Provide the equation.d) Plot Time against Distance with the two separate regression functions based on Sex (one for Women and one for Men). You also need to include the equations of the two regression functions.e) Find the joint confidence intervals for the slopes with a family (Bonferroni adjusted) confidence level of 98%. Include an interpretation of each.f) Test whether Sex should be dropped from the model while Distance is retained. Include the hypotheses, test-statistic, p-value, and conclusions.g) Finally, let us consider the model that predicts Time based on Distance and Sex with interaction. Provide the equation.h) Now test whether Sex should be dropped from the model while Distance and the interaction term are retained. Include the hypotheses, test-statistic, p-value, and conclusions.i) Report the final model with Sex dropped. Does this improve upon the model found in part d)? Explain.2. Continue with the data set scottish_hill_races.csv.a) Fit the first-order regression model that predicts Time based on all potential predictors- Distance Climb, and Sex. Provide the equation.b) Construct a 95% prediction interval for the time it takes a woman to complete a 10 km race with a “climb” of 500 meters.c) Perform an exhaustive search for the “best” subsets of predictors. Which model was chosen as “best” for one predictor? Was it the one we examined in #1? How about for the “best” model with two predictors? Is it the one we examined in #1?d) Examine important criteria for the three “best” models chosen in c). Which model(s) should be included for final consideration based on them?e) Use forward stepwise selection with partial 𝐹-tests and α-to-enter= 0.01. Then use backward stepwise selection with partial 𝐹-tests and α-to-remove= 0.01. Which model is chosen as “best” in each case?f) Considering all results, which model(s) should be considered? Assess the predictive ability of the model(s) by splitting the data into training and testing (sample size 𝑛 = 40) subsets and estimating the mean squared prediction error 𝑀𝑆𝑃𝐸.g) Is there any indication of nonlinear relationships between Time and any of the quantitative predictors? Explain.h) Using basic diagnostics, is there any evidence of multicollinearity?i) Find the variance inflation factors for the quantitative predictors. Explain
need help in stat paper
stat related paper
...
need help in stat paper
stat related paper
Define and interpret the rare event rule for
inferential statistics. This means that you should summarize from the
text and then provide your own understanding of the rare event rule.
Find an article from a peer-reviewed journal that states the p-value.
What is the p-value? What does the p-value tell us? What is the author's
conclusion based on that probability? Was their finding “unusual”, if
unusual is defined as p < .05? Explain.
2 page due in 6hours
STAT3215 Rasmussen College Null and Alternative Hypothesis Questions
Please see attached for the word document that I am needing assistance on.A survey was conducted to get an estimate of the ...
STAT3215 Rasmussen College Null and Alternative Hypothesis Questions
Please see attached for the word document that I am needing assistance on.A survey was conducted to get an estimate of the proportion of smokers among the graduate students. The report says 38% of them are smokers. Mary doubts the result and thinks that the actual proportion is much less than this. Choose the correct choice of null and alternative hypothesis Mary wants to test.Select one:a. Ho: p=.38; Ha: p≠.38. b. Ho: p=.38; Ha: p>.38. c. Ho: p=.38; Ha: p<.38. d. Ho: p=.38; Ha: p≤.38. Question 2An advertiser is believed to exaggerate claims about the high performance of a company's product. A consumer protection agency wants to prove that this advertiser's claims are exaggerated. There is data available. The correct hypothesis test will beSelect one:a. Two-tailed test b. Right-tailed test c. Left-tailed test d. Any test can be used Question 3Significance level (denoted by α) is the probability that the test statistic will fall outside the critical region when the null hypothesis is actually true.Select one:True False Question 4If I want to test the null hypothesis that the mean is 50 versus the alternative that it is greater than 50, and I get a sample mean of 40, which is true?Select one:a. I cannot say anything; I need to know the standard deviation and the sample size. b. Always reject the null hypothesis. c. Never reject the null hypothesis. d. Reject the null if n > 30, otherwise fail to reject. Question 5If α = 0.01 for a two-tailed hypothesis test using the z test, the critical values are:Select one:a. ± 1.90 b. ± 1.96 c. ± 2.33 d. ± 2.58Question 6One problem with hypothesis testing is that a real effect may not be detected. This problem is most likely to occur when:Select one:a. The effect is small, and the sample size is small b. The effect is large, and the sample size is small c. The effect is small, and the sample size is large d. The effect is large, and the sample size is large Question 7Which of the following statements is false?Select one:a. Ho (null hypothesis) refers to a specified value of the population parameter. b. Ho (null hypothesis) refers to a specified value of a sample statistic. c. The statement of Ho (null hypothesis) always contains equality. d. The statement of Ha (alternate hypothesis) never contains equality. Question 8If you use the critical value method, you reject the null hypothesis if the test statistic falls within the critical region.Select one:True False Question 9Which of the following is not a correct statement for an alternative hypothesis?Select one:a. Greater than the value stated in the null hypothesis b. Less than the value stated in the null hypothesis c. Greater than or equal to the value stated in the null hypothesis d. Not equal to the value stated in the null hypothesis Question 10What value of alpha (α) corresponds to 98% confidence level?Select one:a. α=0.01 b. α=0.02 c. α=0.05 d. α=0.10 Question 11Which of the following would be an appropriate alternative hypothesis for a one-tail test?Select one:a. The sample proportion is not less than 0.55. b. The sample proportion is less than 0.55. c. The population proportion is not less than 0.55. d. The population proportion is less than 0.55.Question 12If p-value is greater than alpha in a two-tailed test:Select one:a. The null hypothesis should not be rejected b. The null hypothesis should be rejected c. A one-tailed test should be used d. Alpha should be changed Question 13Which of the following is not a criterion for a procedure that results in a binomial probability distribution?Select one:a. The procedure has a fixed number of trials. b. The trials must be independent. c. Each trial must have all outcomes classified into two categories usually referred to as "success" or "failure." d. The probability of success must be different in each trial.Question 14For what type of hypothesis test do we need to use a "t test?"Select one:a. When the sample size is very small b. When the population standard deviation Ϭ is not known c. Only for two-tailed tests d. When we test a claim for a Population Standard Deviation Question 15A result is called "statistically significant" whenever:Select one:a. The null hypothesis is true b. The alternative hypothesis is true c. The p-value is less or equal to the significance level d. The p-value is larger than the significance level Question 16Not yet answeredSuppose that n = 100, and we want to test whether the population mean is equal to 20 versus the alternative hypothesis that it is not equal to 20. The sample mean is found to be 18, and the sample standard deviation is 10. What is the p-value for this test?Select one:a. 0.0228 b. 0.0456 c. 0.5532 d. 1.00 Question 17If I want to test the null hypothesis that the mean is 100 versus the alternative that it is greater than 100 and I get a sample mean of 90, which of the following is true?Select one:a. I need to know the standard deviation and the sample size. b. Always reject the null hypothesis. c. Never reject the null hypothesis. d. Reject the null if n > 30, otherwise fail to reject. Question 18If the p-value is smaller than alpha, we reject the alternative hypothesis.Select one:True False Question 19For what hypothesis tests do we need to use the Chi-Square distribution?Select one:a. When testing a claim about a Population Mean b. When testing a claim about a Population Standard Deviation c. When testing a claim about a Population Proportion d. Always when a sample size is less than 30 Question 20A hypothesis test is done in which the alternative hypothesis is that more than 10% of a population is left-handed. The p-value for the test is calculated to be 0.25. Which statement is correct?Select one:a. We can conclude that more than 10% of the population is left-handed. b. We can conclude that more than 25% of the population is left-handed. c. We can conclude that exactly 25% of the population is left-handed. d. We cannot conclude that more than 10% of the population is left-handed.
NUR 704 The University of Alabama at Birmingham Descriptive Statistics Questions
1. What does the term Descriptive Statistics mean? 2. Identify which demographic and outcome data points in the case stu ...
NUR 704 The University of Alabama at Birmingham Descriptive Statistics Questions
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Decision Analysis Question
It contains 5 different problems, and total number of questions/parts is around 16. All Multiple Choice questions. I got s ...
Decision Analysis Question
It contains 5 different problems, and total number of questions/parts is around 16. All Multiple Choice questions. I got some examples below.
GWU Hill Running Regression Worksheet
data in csv format , will give later.Hill running is a long-standing Scottish tradition, dating back to 1040. The races ta ...
GWU Hill Running Regression Worksheet
data in csv format , will give later.Hill running is a long-standing Scottish tradition, dating back to 1040. The races take place at various times of year throughout Scotland. The data set (scottish_hill_races.csv) posted on Blackboard contains recent information from 90 races regarding Distance (in kilometers), Climb (in meters), Time (record time in minutes), and Sex (1 for women and 0 for men).a) Find the equation of the estimated simple linear regression function that predicts Time based on Distance.b) Plot the data with regression function found in part a). Distinguish between data points for Women and data points for Men and include a key (legend).c) Now fit the first-order regression model that predicts Time based on Distance and Sex. Provide the equation.d) Plot Time against Distance with the two separate regression functions based on Sex (one for Women and one for Men). You also need to include the equations of the two regression functions.e) Find the joint confidence intervals for the slopes with a family (Bonferroni adjusted) confidence level of 98%. Include an interpretation of each.f) Test whether Sex should be dropped from the model while Distance is retained. Include the hypotheses, test-statistic, p-value, and conclusions.g) Finally, let us consider the model that predicts Time based on Distance and Sex with interaction. Provide the equation.h) Now test whether Sex should be dropped from the model while Distance and the interaction term are retained. Include the hypotheses, test-statistic, p-value, and conclusions.i) Report the final model with Sex dropped. Does this improve upon the model found in part d)? Explain.2. Continue with the data set scottish_hill_races.csv.a) Fit the first-order regression model that predicts Time based on all potential predictors- Distance Climb, and Sex. Provide the equation.b) Construct a 95% prediction interval for the time it takes a woman to complete a 10 km race with a “climb” of 500 meters.c) Perform an exhaustive search for the “best” subsets of predictors. Which model was chosen as “best” for one predictor? Was it the one we examined in #1? How about for the “best” model with two predictors? Is it the one we examined in #1?d) Examine important criteria for the three “best” models chosen in c). Which model(s) should be included for final consideration based on them?e) Use forward stepwise selection with partial 𝐹-tests and α-to-enter= 0.01. Then use backward stepwise selection with partial 𝐹-tests and α-to-remove= 0.01. Which model is chosen as “best” in each case?f) Considering all results, which model(s) should be considered? Assess the predictive ability of the model(s) by splitting the data into training and testing (sample size 𝑛 = 40) subsets and estimating the mean squared prediction error 𝑀𝑆𝑃𝐸.g) Is there any indication of nonlinear relationships between Time and any of the quantitative predictors? Explain.h) Using basic diagnostics, is there any evidence of multicollinearity?i) Find the variance inflation factors for the quantitative predictors. Explain
need help in stat paper
stat related paper
...
need help in stat paper
stat related paper
Define and interpret the rare event rule for
inferential statistics. This means that you should summarize from the
text and then provide your own understanding of the rare event rule.
Find an article from a peer-reviewed journal that states the p-value.
What is the p-value? What does the p-value tell us? What is the author's
conclusion based on that probability? Was their finding “unusual”, if
unusual is defined as p < .05? Explain.
2 page due in 6hours
STAT3215 Rasmussen College Null and Alternative Hypothesis Questions
Please see attached for the word document that I am needing assistance on.A survey was conducted to get an estimate of the ...
STAT3215 Rasmussen College Null and Alternative Hypothesis Questions
Please see attached for the word document that I am needing assistance on.A survey was conducted to get an estimate of the proportion of smokers among the graduate students. The report says 38% of them are smokers. Mary doubts the result and thinks that the actual proportion is much less than this. Choose the correct choice of null and alternative hypothesis Mary wants to test.Select one:a. Ho: p=.38; Ha: p≠.38. b. Ho: p=.38; Ha: p>.38. c. Ho: p=.38; Ha: p<.38. d. Ho: p=.38; Ha: p≤.38. Question 2An advertiser is believed to exaggerate claims about the high performance of a company's product. A consumer protection agency wants to prove that this advertiser's claims are exaggerated. There is data available. The correct hypothesis test will beSelect one:a. Two-tailed test b. Right-tailed test c. Left-tailed test d. Any test can be used Question 3Significance level (denoted by α) is the probability that the test statistic will fall outside the critical region when the null hypothesis is actually true.Select one:True False Question 4If I want to test the null hypothesis that the mean is 50 versus the alternative that it is greater than 50, and I get a sample mean of 40, which is true?Select one:a. I cannot say anything; I need to know the standard deviation and the sample size. b. Always reject the null hypothesis. c. Never reject the null hypothesis. d. Reject the null if n > 30, otherwise fail to reject. Question 5If α = 0.01 for a two-tailed hypothesis test using the z test, the critical values are:Select one:a. ± 1.90 b. ± 1.96 c. ± 2.33 d. ± 2.58Question 6One problem with hypothesis testing is that a real effect may not be detected. This problem is most likely to occur when:Select one:a. The effect is small, and the sample size is small b. The effect is large, and the sample size is small c. The effect is small, and the sample size is large d. The effect is large, and the sample size is large Question 7Which of the following statements is false?Select one:a. Ho (null hypothesis) refers to a specified value of the population parameter. b. Ho (null hypothesis) refers to a specified value of a sample statistic. c. The statement of Ho (null hypothesis) always contains equality. d. The statement of Ha (alternate hypothesis) never contains equality. Question 8If you use the critical value method, you reject the null hypothesis if the test statistic falls within the critical region.Select one:True False Question 9Which of the following is not a correct statement for an alternative hypothesis?Select one:a. Greater than the value stated in the null hypothesis b. Less than the value stated in the null hypothesis c. Greater than or equal to the value stated in the null hypothesis d. Not equal to the value stated in the null hypothesis Question 10What value of alpha (α) corresponds to 98% confidence level?Select one:a. α=0.01 b. α=0.02 c. α=0.05 d. α=0.10 Question 11Which of the following would be an appropriate alternative hypothesis for a one-tail test?Select one:a. The sample proportion is not less than 0.55. b. The sample proportion is less than 0.55. c. The population proportion is not less than 0.55. d. The population proportion is less than 0.55.Question 12If p-value is greater than alpha in a two-tailed test:Select one:a. The null hypothesis should not be rejected b. The null hypothesis should be rejected c. A one-tailed test should be used d. Alpha should be changed Question 13Which of the following is not a criterion for a procedure that results in a binomial probability distribution?Select one:a. The procedure has a fixed number of trials. b. The trials must be independent. c. Each trial must have all outcomes classified into two categories usually referred to as "success" or "failure." d. The probability of success must be different in each trial.Question 14For what type of hypothesis test do we need to use a "t test?"Select one:a. When the sample size is very small b. When the population standard deviation Ϭ is not known c. Only for two-tailed tests d. When we test a claim for a Population Standard Deviation Question 15A result is called "statistically significant" whenever:Select one:a. The null hypothesis is true b. The alternative hypothesis is true c. The p-value is less or equal to the significance level d. The p-value is larger than the significance level Question 16Not yet answeredSuppose that n = 100, and we want to test whether the population mean is equal to 20 versus the alternative hypothesis that it is not equal to 20. The sample mean is found to be 18, and the sample standard deviation is 10. What is the p-value for this test?Select one:a. 0.0228 b. 0.0456 c. 0.5532 d. 1.00 Question 17If I want to test the null hypothesis that the mean is 100 versus the alternative that it is greater than 100 and I get a sample mean of 90, which of the following is true?Select one:a. I need to know the standard deviation and the sample size. b. Always reject the null hypothesis. c. Never reject the null hypothesis. d. Reject the null if n > 30, otherwise fail to reject. Question 18If the p-value is smaller than alpha, we reject the alternative hypothesis.Select one:True False Question 19For what hypothesis tests do we need to use the Chi-Square distribution?Select one:a. When testing a claim about a Population Mean b. When testing a claim about a Population Standard Deviation c. When testing a claim about a Population Proportion d. Always when a sample size is less than 30 Question 20A hypothesis test is done in which the alternative hypothesis is that more than 10% of a population is left-handed. The p-value for the test is calculated to be 0.25. Which statement is correct?Select one:a. We can conclude that more than 10% of the population is left-handed. b. We can conclude that more than 25% of the population is left-handed. c. We can conclude that exactly 25% of the population is left-handed. d. We cannot conclude that more than 10% of the population is left-handed.
NUR 704 The University of Alabama at Birmingham Descriptive Statistics Questions
1. What does the term Descriptive Statistics mean? 2. Identify which demographic and outcome data points in the case stu ...
NUR 704 The University of Alabama at Birmingham Descriptive Statistics Questions
1. What does the term Descriptive Statistics mean? 2. Identify which demographic and outcome data points in the case study a mean, range, and standard deviation will be calculated for. Provide a rationale for why this type of statistical analysis is appropriate for these data points. (Hint: this information is useful for your data analysis plan in NUR 704 or your related MSN courses).
4 pages
MA215 Grantham Week 1 Business Statistics Quiz Help
The collection of all elements of interest in a particular study is A portion of the population selected to represent the ...
MA215 Grantham Week 1 Business Statistics Quiz Help
The collection of all elements of interest in a particular study is A portion of the population selected to represent the population is called
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