Turn-around time of a job is defined as the difference between its completion and arrival times. Individual turn-around times of the Sun & Fun Manufacturing Company can be assumed to be normally distributed. Drawn from an infinite population, in a random sample of n=100 jobs, the sample mean was found to be 5 days and the unbiased sample standard deviation was found to be 2 days. Based on these information, the unbiased point estimate of the unknown population mean is

a.5 days

b.2 days

c.3 days

d.Not enough information given to answer this question