Thirty-six months were randomly sampled and discount rate on new issues of 91-day Treasury Bills was gathered. The sample mean is 4.76% and the standard deviation is 171.21. Determine the unbiased estimate for the mean of the population?
Select one:
a. 29312.86
b. 13.0847
c. 0.0476
d. 4.76%
e. 8.1496