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STUDENT 1: SJ
- Dec 2 Chapter 1 Post-Test
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- Dec 2 Chapter 3 Review Quiz
STUDENT 2: SM
- Dec 2 Chapter P Review Homework
- Dec 2 Chapter P Review Quiz
- Dec 2 Chapter P Post-Test
STUDENT 3: NJ
- Dec 2 Chapter P Review Homework
- Dec 2 Chapter P Review Quiz
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PSY 520 Grand Canyon University Correlation and Regression Project
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Sampling and Error Algebra Quiz, algebra homework help
1. Which of the following situations would not produce an unbiased random sample?a. Send a survey to students at an online private high school to find out how many students use the computer to do school work.b. Asking every twentieth person on a list of registered voters to determine which political candidate is favored.c. Ask every tenth person in 12th grade at Jacaranda high school to find out the favorite TV show for seniors at that school.d. Survey 2 teachers in each subject at Bluefort High School to find out how many had graduate degrees.2. Which of the following situations could be used to produce an unbiased random sample?a. Surveying students in a college psychology class to find out preferred majors of students at that school.b. Asking people at the local supermarket
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poll asked people to name the most serious problem facing the country.
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Mat154 Statistics Project
Problem: Consider one way of modeling a problem. Say you have a device and in any given year, there is a 1 in 6 chance t ...
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Problem: Consider one way of modeling a problem. Say you have a device and in any given year, there is a 1 in 6 chance that the device will fail. One question is, “On average, how long will it be before such a device fails?” This sort of problem is what will be modeled and analyzed here.Part 1 [Excel] (Empirical Analysis): Simulate 20 repetitions of obtaining a value for , that is, roll until a 1 is rolled, record the result and repeat this 20 times. For example, if you roll , then record 4 since 4 rolls were required. You can complete this using a die or simulating using Excel, Python, or some other option, e.g., Random.org. Record your rolls and counts.Compute the mean and standard deviation of your values for . Given the modeling problem we started with, interpret the mean and standard deviation you found in terms of how many years are expected before the device fails. Excel might be used for this part as it makes the calculations, recording of data, etc. very simple. However, it is not required.Part 2 [Excel] (Theoretical Analysis - Approximations): Compute approximations to expected value, variance, and standard deviation of the random variable . See the additional notes for discussion on these computations, in brief: = the probability of rolling something other than a 1 )-times, then rolling a 1 on the th throw. Make a table for the first 20 values: , the probability that you get the first 1 in at most 20 rolls. using the first 20 values for , namely . using the first 20 terms. For this, use and then use this and the above to get a rough approximation of . using the first 20 terms.Repeat the third item of Part 1:Given the modeling problem we started with, interpret and in terms of how many years are expected before the device fails. 1 2 … 20 Totals Use this table to computePart 3 [Written] (Theoretical Analysis – Exact Computations – (Optional)): Compute the expected value, variance, and standard deviation of the random variable . See the additional notes for discussion on these computations, in brief: (Expected Value) (Variance) (Standard Deviation) Hint: For computing these without directly manipulating the infinite summations that appear in the definitions of and , let be the event that a 1 is rolled on the first throw and be the complementary event, namely, that a 1 is not rolled on the first throw. It is clear that since what is rolled after the first roll is just like starting over. It is also clear that . The Law of Total Expectation (see notes) gives: This makes it quite simple to find . A similar “trick” can be used to find , here you will use .Again, the Law of Total Expectation gives: and from this it is simple to compute .
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Most Popular Content
PSY 520 Grand Canyon University Correlation and Regression Project
Use the attached document “Correlation and Regression” to complete the assignment.While apa format is not required for ...
PSY 520 Grand Canyon University Correlation and Regression Project
Use the attached document “Correlation and Regression” to complete the assignment.While apa format is not required for the body of this assignment, solid academic writing is expected, and documentation of sources should be presented using apa formatting guidelines, which can be found in the apa Style Guide, located in the Student Success Center.Benchmark InformationThis benchmark assignment assesses the following programmatic competency:MS Psychology3.1 Interpret psychological phenomena using scientific reasoning.
4 pages
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In almost every decision market analyst make, it is essential to consider some kind of forecast methods. Sound predictions ...
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In almost every decision market analyst make, it is essential to consider some kind of forecast methods. Sound predictions of market trends and demand ...
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In the familiar song "The Twelve Days of Christmas," the total number of gifts received each day is a triangular number. O ...
Patterns and Problem Solving
In the familiar song "The Twelve Days of Christmas," the total number of gifts received each day is a triangular number. On the first day there was 1 gift, on the second day there were 3 gifts, on the third day there were 6 gifts, etc., until the 12th day of Christmas. What is the total number of gifts received during all twelve days?
Sampling and Error Algebra Quiz, algebra homework help
1. Which of the following situations would not produce an unbiased random sample?a. Send a survey to students at an online ...
Sampling and Error Algebra Quiz, algebra homework help
1. Which of the following situations would not produce an unbiased random sample?a. Send a survey to students at an online private high school to find out how many students use the computer to do school work.b. Asking every twentieth person on a list of registered voters to determine which political candidate is favored.c. Ask every tenth person in 12th grade at Jacaranda high school to find out the favorite TV show for seniors at that school.d. Survey 2 teachers in each subject at Bluefort High School to find out how many had graduate degrees.2. Which of the following situations could be used to produce an unbiased random sample?a. Surveying students in a college psychology class to find out preferred majors of students at that school.b. Asking people at the local supermarket
what their favorite brand of ice cream is to find out what the preferred
brand of ice cream is in that city.c. Survey every tenth audience member leaving the American Country Music Awards and ask what their favorite type of music is. d. Finding the heights of all 9th grade
female students at a high school and using it to determine the average
height of all girls at the school.3. Find the margin of error if p = 71% and n = 100. Round to four decimal places.a. 0.2204b. 0.0041c. 0.0848d. 0.09084. Find the margin of error if p = 65% and n = 500. Round to four decimal places.a. 0.0427b. 0.0926c. 0.0009d. 0.04145. A
poll asked people to name the most serious problem facing the country.
forty-three percent of the 900 randomly selected people said crime. What
is the margin of error? Round to four decimal places.a. 0.0165b. 0.0330c. 0.0261d. 0.05236. According
to a recent poll, 40% of shoppers planned to spend $1000 or more during
a holiday season. The margin of error was 4%. How many people were
surveyed?a. 600b. 38c. 1400d. 10007. One hundred people were
asked whether they would vote for Candidate A or Candidate B in an
upcoming election. More people said they would vote for Candidate A. How
many said they would vote for Candidate A if the margin of error was
8.4%.a. 92%b. 8%c. 77%d. 23%8. Five-hundred
ten of 650 high school students said that pizza was their favorite food
in the school cafeteria. What is the margin of error? Round to four
decimal places.a. 0.0005b. 0.0003c. 0.0161d. 0.03229. Complete the sentence with the best answer.When p stays the same but the sample size increases, the Margin of Error ___?___.a. increasesb. decreasesc. stays the samed. all of the above.10. In
a recent survey 45% of students at a local high school said they love
chocolate ice cream. If the margin of error was 4.3%, about how many
students were surveyed?a. 973 studentsb. 535 studentsc. 133 studentsd. 243 students
Mat154 Statistics Project
Problem: Consider one way of modeling a problem. Say you have a device and in any given year, there is a 1 in 6 chance t ...
Mat154 Statistics Project
Problem: Consider one way of modeling a problem. Say you have a device and in any given year, there is a 1 in 6 chance that the device will fail. One question is, “On average, how long will it be before such a device fails?” This sort of problem is what will be modeled and analyzed here.Part 1 [Excel] (Empirical Analysis): Simulate 20 repetitions of obtaining a value for , that is, roll until a 1 is rolled, record the result and repeat this 20 times. For example, if you roll , then record 4 since 4 rolls were required. You can complete this using a die or simulating using Excel, Python, or some other option, e.g., Random.org. Record your rolls and counts.Compute the mean and standard deviation of your values for . Given the modeling problem we started with, interpret the mean and standard deviation you found in terms of how many years are expected before the device fails. Excel might be used for this part as it makes the calculations, recording of data, etc. very simple. However, it is not required.Part 2 [Excel] (Theoretical Analysis - Approximations): Compute approximations to expected value, variance, and standard deviation of the random variable . See the additional notes for discussion on these computations, in brief: = the probability of rolling something other than a 1 )-times, then rolling a 1 on the th throw. Make a table for the first 20 values: , the probability that you get the first 1 in at most 20 rolls. using the first 20 values for , namely . using the first 20 terms. For this, use and then use this and the above to get a rough approximation of . using the first 20 terms.Repeat the third item of Part 1:Given the modeling problem we started with, interpret and in terms of how many years are expected before the device fails. 1 2 … 20 Totals Use this table to computePart 3 [Written] (Theoretical Analysis – Exact Computations – (Optional)): Compute the expected value, variance, and standard deviation of the random variable . See the additional notes for discussion on these computations, in brief: (Expected Value) (Variance) (Standard Deviation) Hint: For computing these without directly manipulating the infinite summations that appear in the definitions of and , let be the event that a 1 is rolled on the first throw and be the complementary event, namely, that a 1 is not rolled on the first throw. It is clear that since what is rolled after the first roll is just like starting over. It is also clear that . The Law of Total Expectation (see notes) gives: This makes it quite simple to find . A similar “trick” can be used to find , here you will use .Again, the Law of Total Expectation gives: and from this it is simple to compute .
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