5.395.40-41 (45.425.435.44In the past, 20% of applicants for admission into a master's program had GRE scores above 650. Of the 88students applying to be admitted into the program in 1981, 22 had GRE scores above 650. Do the 1981applicants have greater GRE scores than previous applicants at the 5% level of significance?Ans. No5.45Find the probability of accepting Ho (that = 650) for Prob. 5.39 if = 0.043 and(b) p = 0.22, (c) p = 0.24, (d) p = 0.25, (e) p = 0.26, and () p = 0.28.(c) 0.591 (d) 0.5 (e) 0.409 () 0.242Ans. (a) 0.877 (b) 0.758(a) p = 0.20,(a) What is the value of a when p = 0.20 in Prob. 5.39 (b) How can the OC curve be derived for Prob. 5.39?Ans. (a) 0.123 (b) By joining the value of 1-a for p = 0.20 with the values of ß found in Prob. 5.40(b) to(f) for various values of p > 0.20Find the probability of rejecting Ho (that = 650) for Prob. 5.39 if o = 0.043 and (a) p = 0.20,(b) p = 0.22, (c) p = 0.24, (d) p = 0.25, (e) p = 0.26, and (f) p = 0.28.Ans. (a) 0.123 (b) 0.242 (c) 0.409 (d) 0.5 (e) 0.591 () 0.758TESTING HYPOTHESES FOR DIFFERENCES BETWEEN TWO MEANS OR PROPORTIONSA consulting firm wants to decide at the 5% level of significance if the salaries of construction workers differbetween New York and Chicago. A random sample of 100 construction workers in New York has anaverage weekly salary of $400 with a standard deviation of $100. In Chicago, a random sample of 75workers has an average weekly salary of $375 with a standard deviation of $80. Is there a significantdifference between the salaries of construction workers in New York and Chicago at (a) The 5% level?(b) The 10% level?Ans. (a) No (b) YesHow can we get the power curve for Prob. 5.39?Ans. By joining the values found in Prob. 5.42(a) to (f) for various alternative values of p > 0.2.A random sample of 21 AFC football players has a mean weight of 265 lb with a standard deviation of 30 lb,while a random sample of 11 NFC players has a mean weight of 240 lb with a standard deviation of 20lb. Isthe mean weight of all AFC football players greater than that for the NFC players at the 1% level ofsignificance?Ans. Yes

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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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