Author Question: The amount of time required for an oil and filter change on an automobile is normally distributed ... (Read 28 times)

Engineer · **on:** Jun 24, 2018

The amount of time required for an oil and filter change on an automobile is normally distributed with a mean of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selected. 90 of the sample means will be greater than what value?

What will be an ideal response?

Question 2

The probability that a standard normal variable, Z, is between 1.50 and 2.10 is the same as the probability Z is between -2.10 and -1.50.

Indicate whether the statement is true or false