In developing an interval estimate for a population mean, a sample of 50 observations was used. The interval estimate was19.76 1.32. Had the sample size been 200 instead of 50, the interval estimate would have beenOA. 9.881.32B. 4.94 +1.32c. 19.76 ± 0.66D. 19.76 0.33The Z value for a 96.6% confidence interval estimate isA. 1.82OB. 1.96C. 2.00D. 2.12

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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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At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation o= 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed. a. State the hypotheses. Ho: μ Ha: - Select your answer - - Select your answer - + + 935 b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean of x = (to the nearest whole number)? c. Use the confidence interval to conduct a hypothesis test. Using a = 0.05, can the assistant dean conclude that the mean examination score for the new freshman applications has changed? - Select your answer - ♦ d. What is the p-value (to 4 decimals)? (Use Table 1 from Appendix B.)
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