Ashareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive officer (ceo) was at least nine years. a survey of companies reported in the wall street journal found a sample mean tenure of x = 7.07 years for ceos with a standard deviation of s = 6.38 years. (a) choose the correct hypotheses that can be used to challenge the validity of the claim made by the shareholders' group. h0: μ years ha: μ years (b) assume that 85 companies were included in the sample. what is the p value for your hypothesis test? if required, round your answer to four decimal places. (c) at α = 0.01, what is your conclusion? we the null hypothesis. we conclude that the mean tenure for a ceo is shorter than nine years.