Question

Step 1

Given

X~N(625,70)

Note: 70 is standard deviation

We have used the method to standardize the normal distribution to make it standard normal distribution to get the required probability. Formula to standardize the normal distribution is given on white board.

Step 2

In this part we have to find the probability that the federal regulatory commission will randomly test a line and find the pressure to be less than 650 pound...

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