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Author Question: An automotive repair shop has determined that the average service time on an automobile is 2 hours ... (Read 147 times)

EAugust

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on: Jun 24, 2018
An automotive repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of 32 minutes. A random sample of 64 services is selected.
 a. What is the probability that the sample of 64 will have a mean service time greater than 114 minutes?
 b. Assume the population consists of 400 services. Determine the standard error of the mean.

Question 2

The highest point of a normal curve occurs at _____.
 a. one standard deviation to the right of the mean
  b. two standard deviations to the right of the mean
  c. approximately three standard deviations to the right of the mean
  d. the mean


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tjayeee

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

a. .9332
b. 3.67

Answer to Question 2

d


EAugust

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Reply 2 on: Jun 24, 2018
Gracias!

nyrave

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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