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Author Question: Which of the following is an unbiased estimator for the corresponding parameter? a.The ... (Read 138 times)

fasfsadfdsfa

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on: Jun 24, 2018

  Which of the following is an unbiased estimator for the corresponding parameter?
 

  a.The population standard deviation is an unbiased estimator for the sample standard deviation s.
  b.The sample mean is an unbiased estimator for the population mean .
  c.The population proportion is an unbiased estimator for the sample proportion.
  d.The population variance is an unbiased estimator for the sample variance s2.

Question 2


  Suppose the income of recent doctoral graduates who become professors at a university is approximately normally distributed with a mean income of 42,000 and a standard deviation of 8000. If a random sample of size 100 is taken and the mean is calculated, what is the probability that this mean value will be between 43,500 and 45,000?
 

  a.0.072
  b.0.0309
  c.0.9999
  d.0.969


deja

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

correct: b

Answer to Question 2

correct: b


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