Refer to the Psychological Science (Vol. 22, 2011) study of a chief executive officer's facial structure, Exercise

Question:

Refer to the Psychological Science (Vol. 22, 2011) study of a chief executive officer's facial structure, Exercise 6.20. Recall that the facial width-to-height ratio (WHR) was determined by computer analysis for each in a sample of 55 CEOs at publicly traded Fortune 500 firms, with the following results: x̅ = 1.96, s = .15.

a. Find and interpret a 95% confidence interval for the standard deviation, s, of the facial WHR values for all CEOs at publicly traded Fortune 500 firms. Interpret the result.

b. For the interval, part a, to be valid, the population of WHR values should be distributed how? Draw a sketch of the required distribution to support your answer.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...