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Author Question: A researcher believes that women today weigh less than in previous years. To investigate this ... (Read 75 times)

sarasara

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on: Jun 19, 2018
A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4 . A local census taken several years ago shows the mean weight of adult women was 115 lbs. The df for determining tcrit = _________.
 
  a. 41 c. 39
  b. 40 d. need more information

Question 2

The confidence interval for the population mean is _________.
 
  a. a range of values which probably contains the population mean
  b. a range of values which contains the population mean
  c. the same from sample-to-sample
  d. a range of values which probably contains the population meanand the same from sample-to-sample


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lolol

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Reply #1 on: Jun 19, 2018
Answer to Question 1

B

Answer to Question 2

A


sarasara

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Reply 2 on: Jun 19, 2018
Great answer, keep it coming :)

bassamabas

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Reply 3 on: Yesterday
Wow, this really help

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