Chen IncWants to Estimate the Average Processing Time for 2000 Current

Multiple Choice

Chen Inc.wants to estimate the average processing time for 2000 current orders.You take a simple random sample of 40 orders, and determine the average processing time required for the orders in the sample is 6.5 hours, with a sample standard deviation of 1.6 hours.Build the 95% confidence interval estimate of average processing time for the population of 2000 orders.Show the upper bound for your interval.

A) 7.00
B) 6.47
C) 6.61
D) 7.49
E) 6.53