A one-sample z-test was used to test the following hypotheses: Ho: μ = 47 and H₁ : µ ‡ 47.Select the pair of 95% and 99% confidence intervals (which were based on the z-test) that are consistentwith the following conclusion:There is moderate, but not strong, evidence against the null hypothesis. In fact the population meanappears to be greater than 47.'Select one:O The 95% confidence interval is (17.5, 41.1) and the 99% confidence interval is (13.8, 44.8).The 95% confidence interval is (54.7, 78.3) and the 99% confidence interval is (51.0, 82.0).The 95% confidence interval is (48.4, 72.0) and the 99% confidence interval is (44.7, 75.7).The 95% confidence interval is (32.5, 56.1) and the 99% confidence interval is (28.8, 59.8).The 95% confidence interval is (21.7, 45.3) and the 99% confidence interval is (18.0, 49.0).

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Answered: A one-sample z-test was used to test…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Assume we wish to test to see if the mean starting salary of statistics professors is different than the mean starting salary of biology professors: Let Ho: µStat = µBio versus Ha: µStat µBio at the alpha = .05 level of significance and we found the following 95% confidence interval: (126, 610) for µStat - µBio. We would reject Ho. We would Fail to Reject Ho. We would reject Ho based on a 90% confidence interval. We would fail to reject Ho based on a 90% confidence interval. Assume that we use the same sample to construct the 90% confidence interval. Please pick a choice from the following 4 options.
Find the critical value for a 98% confidence level and a sample size of n=15.
Suppose that you are testing the following hypotheses: Ho: p = .80 and Ha: p # .80. You calculate a test statistic value of z = -6.08. True or False: At a 95% confidence level, which is alpha = .05, you should reject the null hypothesis. True False
Give a 99.8% confidence interval, for µ1 - µ2 given the following information. 2.04, s1 = 0.39 20, ã1 60, x2 = 2.37, 82 - 0.7 n2 Use Technology Rounded to 2 decimal places.
Answer question 4
You may need to use the appropriate appendix table or technology to answer this question. The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 = 60 n2 = 25 x1 = 13.6 x2 = 11.6 ?1 = 2.4 ?2 = 3 (a) What is the point estimate of the difference between the two population means? (Use x1 − x2.) (b) Provide a 90% confidence interval for the difference between the two population means. (Use x1 − x2. Round your answers to two decimal places.) to (c) Provide a 95% confidence interval for the difference between the two population means. (Use x1 − x2. Round your answers to two decimal places.) to
Consider the following two confidence intervals for B₁: 90% confidence interval: [0.49, 29.51] 95% confidence interval: [-2.29, 32.29] You want to test the null hypothesis that B₁ = 0 against the alternative hypothesis that ß₁ ‡ 0. Which of the following is true? Select all that apply. You reject the null hypothesis at the 5% significance level You fail to reject the null hypothesis at the 10% significance level. You fail to reject the null hypothesis at the 5% significance level You reject the null hypothesis at the 10% significance level
20.21
QUESTION 5 You're running a one-sample t-test comparing your sample (M = 27.9, SD = 3.8) of 28 observations with a population that has p-36.7 at a = 0.05. Calculatet obs %3D your confidence interval: to and your decision regarding the null hypothesis (reject/fail to reject): QUESTION 6 You're running a one-sample t-test comparing your sample (M 22.2, SD = 3.5) of 15 observations with a population that has u = 22.5 at a = 0.001. Calculate t_obs your confidence interval: to and your decision regarding the null hypothesis (reject/fail to reject):

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