The package of Sylvania CFL 65-watt replacement bulbs that use only 16 watts claims that these bulbs

Question:

The package of Sylvania CFL 65-watt replacement bulbs that use only 16 watts claims that these bulbs have an average life of 8000 hours. Assume that the lives of all such bulbs have a normal with a mean of 8000 hours and a standard deviation of 400 hours. Let be the average life of 25 randomly selected such bulbs. Find the mean and standard deviation of , and comment on the shape of its sampling 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...