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Author Question: The amount of time required for an oil and filter change on an automobile is normally distributed ... (Read 73 times)

Engineer

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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


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mrphibs

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Reply #1 on: Jun 24, 2018
Answer to Question 1

41.8 minutes

Answer to Question 2

TRUE


Engineer

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

miss_1456@hotmail.com

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Reply 3 on: Yesterday
Excellent

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