statistics quiz

Anonymous
timer Asked: Dec 11th, 2018
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I have a test due it is a timed test, 120 mins for 30 questions. I do not have any room for error and need a tutor who is excellent in statistics, so that I can pass. PLEASE LET ME KNOW IF ANYONE CAN HELP ME PASS, I NEED THE BEST OF THE BEST!


ATTACHED IS A PRACTICE EXAM OF WHAT SOME QUESTIONS WOULD LOOK LIKE.

PRACTICE EXAM 3- Math 251 Please remember that this is only one of the tools that you can use to prepare yourself for the test. In addition you should read your text. You can also watch videos listed in β€œmodules” and solve exercises in your text and quizzes. Good luck with your work. I. Examine the given statement, and then express the null hypothesis and alternative hypothesis in symbolic form. Do not try to test it. The mean age of CCP students is greater than 20. II. Examine the given statement, then express the null hypothesis and alternative hypothesis in symbolic form. Do not try to test it. The proportion of people with green eyes is 0.2 III. Assume that the t-distribution applies and find the critical value(s). The significance level is 0.05 and alternative hypothesis is: pβ‰ 0.7, sample size 32. IV. Assume that the normal distribution applies and find the critical values. The significance level is 0.00004 and alternative hypothesis is: p<0.7 V. Assume that the normal distribution applies and find the critical values. The significance level is 0.00022 and the test is right-tailed. VI. Use the given information to find the P-value (normal distribution was used) The test statistic is a two-tailed test is z=1.78 VII. Use the given information to find the P-value (normal distribution was used) The test statistic is z= 3.72, 𝐻0 : πœ‡ = 5, 𝐻1 : πœ‡ > 3 VIII. An economist wants to estimate the mean income for the first year of work for college graduates. How many such incomes must be found if we want to be 95% confident that the sample mean is within $500 of the true population mean. Assume that a previous study has revealed that for such incomes standard deviation is $6250. IX. A certain hypothesis was tested at level of significance 0.04. Would you reject it, if pvalue was 0.45? X. A certain hypothesis was tested at level of significance 0.01. Would you reject it, if pvalue was 0.0025 ? XI. Fill in the missing value in the table in such way that the correlation coefficient between x and y is -1. x y 2 -6 XII. 3 -9 1 -2 3 Find the best predicted value of y given that x=1. The given statistics are summarized from paired sample data: r=0.872, n=500, the equation of the regression line is y=-2x+5, and the mean value of y's is 3. Test if there is a correlation between x and y (use one of the two methods provided). Since we reject the hypothesis that the correlation is 0, we will use the regression line: 𝑦 = βˆ’2 Γ— 3 + 5 = βˆ’1 XIII. Find the best predicted value of y given that x=1. The given statistics are summarized from paired sample data: r=0.02, n=50, the equation of the regression line is y=8x+5, and the mean value of y's is 3. Test if there is a correlation between x and y (use one of the two methods provided). Since we fail to reject the hypothesis that the correlation is 0, we will use the mean value of y’s as the answer. XIV. What kind of relationship is measured by correlation coefficient? XV. Give the definition of p-value In addition you can learn a lot by solving problems that are given to you in the text (Bluman). Solve them independently and then compare your solutions with what you have in the text. Example 7-1, p. 360 Example 7-2, p.360 Example 7-3, p.362 Example 7-4, p. 364 Example 7-6, p.372 Example 7-7, p. 372 Example 7-9, p. 378 Example 7-10, p. 379 Example 8-4, p. 415 Example 8-5, p.416 Example 8-6, p 419 Example 8-7, p. 420 Example 8-12, p. 429 Example 8-13, p430 Example 8-14, p. 430 Example 8-15, p. 431 Example 8-16, p. 432 Example 8-17, p. 438, Example 8-18, p. 439 Example 8-19, p. 440 Example 8-20, p. 440 Example 10-7, p. 544 Example 10-9, p. 553 Example 10-10, p. 554

Tutor Answer

Haristephen
School: New York University

HELLO,send me th...

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Review

Anonymous
Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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