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Author Question: What happens to the standard deviation of as the sample size decreases? a.It increases. b.It ... (Read 101 times)

nautica902

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on: Jun 24, 2018

  What happens to the standard deviation of as the sample size decreases?
 

  a.It increases.
  b.It decreases.
  c.It stays the same.
  d.It becomes normal.

Question 2


  Suppose the income of recent college graduates who become public school teachers is approximately normally distributed with a mean income of 30,000 and a standard deviation of 5200. A random sample of size 30 is taken and the mean is calculated. What is the probability that this mean value will be between 29,500 and 32,000?
 

  a.0.4825
  b.0.1880
  c.0.6834
  d.0.9825


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Dominic

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

correct: a

Answer to Question 2

correct: c


nautica902

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

amcvicar

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

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