Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 142 millimeters, and a standard deviation of 6 millimeters. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would be greater than 139.7 millimeters? round your answer to four decimal places.

0.9884

Step-by-step explanation:

Given :  Population mean :

and standard deviation :

sample size : n= 35

Let x be the random variable that represents the diameter of steel bolts.

Using formula ,

The z-value corresponds to x=139.7

The probability that the sample mean would be greater than 139.7 millimeters will be :-

Hence, the required probability : = 0.9884

answer: yes youre right.

step-by-step explanation:

24/56=hx^7

step-by-step explanation: