A new process for producing a type of novolac resin is supposed to have a mean cyclic time of 3.5 hours per batch. Six batches are produced, and their cyclic times, in hours, were 3.45 3.47 3.57 3.52 3.40 3.63 Can you conclude that the mean cyclic time is greater than 3.5 hours

Given :

Six cyclic times :

3.45 3.47 3.57 3.52 3.40 3.63

To Find :

Can you conclude that the mean cyclic time is greater than 3.5 hours.

Solution :

We know, mean of n numbers are given by :

Therefore, the mean cyclic time is greater than 3.5 hours.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8