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Author Question: The 90 confidence interval estimate of a population standard deviation when a sample variance of 50 ... (Read 37 times)

ss2343

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on: Aug 1, 2018
The 90 confidence interval estimate of a population standard deviation when a sample variance of 50 is obtained from a sample of 15 items is
 a. 26.8 to 124.356.
  b. 5.177 to 11.152.
  c. 5.436 to 10.321.
  d. 29.555 to 106.529.

Question 2

The 99 confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is
 a. 4.589 to 62.253.
  b. 46.538 to 422.171.
  c. 54.941 to 746.974.
  d. 62.042 to 562.895.


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snackralk

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

c

Answer to Question 2

c


ss2343

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Reply 2 on: Aug 1, 2018
Great answer, keep it coming :)

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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