A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive office (CEO) was at least nine years. A survey of companies reported in The Wall Street Journal found asample mean tenure of x = 7.27 years for CEOS with a standard deviation of s = 6.38 years.(a) Formulate hypotheses that can be used to challenge the validity of the claim made by the shareholders' group.Ho: Hs 9H2: µ > 9Ho:H = 9Ha: u + 9Ha: H 2 96 > rl :0HHa: µ < 9Ho:H> 9H: µ s 9(b) Assume 95 companies were included in the sample.What is the test statistic? (Round your answer to three decimal places.)What is the p-value for your hypothesis test? (Round your answer to four decimal places.)p-value( c ) At α =0.01, what is your conclusion?Do not reject Ho. We cannot conclude that the mean tenure of a CEO is significantly lower than 9 years. The claim of the shareholders group is valid.Reject Ho. We can conclude that the mean tenure of a CEO is significantly lower than 9 years. The claim of the shareholders group is not valid.Reject Ho. We cannot conclude that the mean tenure of a CEO is significantly lower than 9 years. The claim of the shareholders group is valid.Do not reject Ho. We can conclude that the mean tenure of a CEO is significantly lower than 9 years. The claim of the shareholders group is not valid.

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a) Given claim is the mean tenure for a chief executive office was at at least nine years. Null Hypothesis: H0:μ≥9 Alternative Hypothesis: H0:μ<9 Correct option:b) Given x¯=7.27s=6.38n=95 Test statistic: t=x¯-μsn =7.27-96.3895=-2.643 p value: df=n-1=95-1=94 p=P(t<test statistic) =P(t<-2.643) =0.0048 from the excel function, =T.DIST(-2.643,94,TRUE)Decision Rule: If p-value ≤ α, then reject the null hypothesis. Conclusion: The level of significance is α=0.01 Here, the p-value is less than the level of significance. From the decision rule, reject the null hypothesis. correct option:

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A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive office (CEO) was at least nine years. A survey of companies reported in The Wall Street Journal found sample mean tenure of x = 7.27 years for CEOS with a standard deviation of s = 6.38 years. (a) Formulate hypotheses that can be used to challenge the validity of the claim made by the shareholders' group. Ho:HS9 HaiH > 9 Ho: H = 9 HoiH #9 Ho: H < 9 Hoi H2 9 H:H < 9 O Ho: H > 9 (b) Assume 95 companies were included in the sample. What is the test statistic? (Round your answer to three decimal places.)

A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive office (CEO) was at least nine years. A survey of companies reported in The Wall Street Journal found sample mean tenure of x = 7.27 years for CEOS with a standard deviation of s = 6.38 years. (a) Formulate hypotheses that can be used to challenge the validity of the claim made by the shareholders' group. Ho:HS9 HaiH > 9 Ho: H = 9 HoiH #9 Ho: H < 9 Hoi H2 9 H:H < 9 O Ho: H > 9 (b) Assume 95 companies were included in the sample. What is the test statistic? (Round your answer to three decimal places.)

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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