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Author Question: The producer of a certain medicine claims that their bottling equipment is very accurate and that ... (Read 77 times)

stevenposner

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on: Aug 1, 2018
The producer of a certain medicine claims that their bottling equipment is very accurate and that the standard deviation of all their filled bottles is .1 ounces or less. A sample of 20 bottles showed a standard deviation of .11 ounces. The test statistic to test the claim is
 a. 2.3.
  b. 22.99.
  c. 4.85.
  d. 24.2.

Question 2

The manager of the service department of a local car dealership has noted that the service times of a sample of 30 new automobiles has a standard deviation of 6 minutes. A 95 confidence interval estimate for the standard deviation of the service times (in minutes) for all their new automobiles is
 a. 16.047 to 45.722.
  b. 4.778 to 8.066.
  c. 2.93 to 6.31.
  d. 22.833 to 65.059.


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hramirez205

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Reply #1 on: Aug 1, 2018
Answer to Question 1

b

Answer to Question 2

b


stevenposner

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Reply #2 on: Aug 1, 2018
Thank you!


hramirez205

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Reply #3 on: Aug 1, 2018
Always glad to help...


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