The brightness of a television picture tube can be evaluated by measuring the amount of current required

Question:

The brightness of a television picture tube can be evaluated by measuring the amount of current required to achieve a particular brightness level. A sample of 10 tubes results in x = 317.2 and s = 15.7. Find (in micro amps) a 99% confidence interval on mean current required. State any necessary assumptions about the underlying of the data.
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...