Question

A new process for producing a type of novolac resin is supposed to have a mean cycle time of 3.5 hours per batch. Six batches are produced, and their cycle times, in hours, were 3.45 3.47 3.57 3.52 3.40 3.62. Can you conclude that the mean cycle time is greater than 3.5 hours

Answer 1

Yes, the mean cycle time is greater than 3.5 hours

Explanation:

Let us try to calculate the mean cycle time here. Consider the given cycle times. To obtain the mean cycle time, we have.

3.45 + 3.47 + 3.57 + 3.52 + 3.40 + 3.62/6 = 3.505 hours

Hence the difference 3.505 -3.5 = 0.005

Hence mean cycle time is greater than 3.5 by 0.005