The Lundberg Survey monitors gas prices at gas stations nationwide. In a recent month, Lundberg reported that

Question:

The Lundberg Survey monitors gas prices at gas stations nationwide. In a recent month, Lundberg reported that the average regular gas price for the stations it surveyed was $3.506 per gallon. Assume the population distribution of gas prices is normal. If the sample size was 20 stations and the standard deviation of gas prices in the sample was $.16,

a. Build a 95% confidence interval estimate of the average price of a gallon of gas for the population of gas stations nationwide.

b. If the size of the sample was 10 instead of 20, show the 95% confidence interval estimate.

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...