According to the Internal Revenue Service, 75 of all tax returns lead to a refund A random sample of 100 tax returns is taken a What is the mean of the distribution of the sample proportion of returns leading to refunds b What is the variance of the sample proportion c What is the standard error of...

According to the Internal Revenue Service, 75% of all tax returns lead to a refund. A random

Question:

According to the Internal Revenue Service, 75% of all tax returns lead to a refund. A random sample of 100 tax returns is taken.
a. What is the mean of the of the sample proportion of returns leading to refunds?
b. What is the variance of the sample proportion?
c. What is the standard error of the sample proportion?
d. What is the probability that the sample proportion exceeds 0.8? 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...