It is known that the incomes of subscribers to a particular magazine have a normal distribution with

Question:

It is known that the incomes of subscribers to a particular magazine have a normal with a standard deviation of $6,600. A random sample of 25 subscribers is taken.
a. What is the probability that the sample standard deviation of their incomes is more than $4,000?
b. What is the probability that the sample standard deviation of their incomes is less than $8,000? 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...