6.130 CEO pay.
A study of the pay of corporate chief executive officers (CEOs) examined the increase in cash compensation of the CEOs of 104 companies, adjusted for infation, in a recent year. The mean increase in real compensation was , and the standard deviation of the increases was . Is this good evidence that the mean real compensation of all CEOs increased that year? The hypotheses are
354
Because the sample size is large, the sample is close t the population , so take .