A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive officer (CEO) was at least eight years. A survey of companies reported in The Wall Street Journal found a sample mean tenure of x = 7.2 years for CEOs with a standard deviation of s = 7.1 years.

a. Formulate hypotheses that can be used to challenge the validity of the claim made by the shareholders' group.

Ho : u	- Select your answer -<>=	8
Ha : u	- Select your answer -<>=	8

b. Assume 70 companies were included in the sample. What is the p-value for your hypothesis test? Enter negative value as negative number.

t-value	(to 3 decimals)
p -value

c. At a = 0.05 , what is your conclusion?

____________ the null hypothesis. We ___________ enough evidence to disprove the shareholder group's claim.