Each member of a random sample of 15 business economists was asked to predict the rate of

Question:

Each member of a random sample of 15 business economists was asked to predict the rate of inflation for the coming year. Assume that the predictions for the whole population of business economists follow a normal with standard deviation 1.8%.
a. The probability is 0.01 that the sample standard deviation is bigger than what number?
b. The probability is 0.025 that the sample standard deviation is less than what number?
c. Find any pair of numbers such that the probability that the sample standard deviation that lies between these numbers is 0.90. 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...