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Author Question: What is a 90 confidence interval for the population mean if the test scores on a 100-point test ... (Read 72 times)

abc

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on: Jun 24, 2018

  What is a 90 confidence interval for the population mean if the test scores on a 100-point test were recorded for the following 5 students? Scores for the five students were: 95, 85, 80, 70, and 90.
 

  a.(70, 95)
  b.(72.06, 95.94)
  c.(74.83, 93.17)
  d.(75.23, 92.77)

Question 2


  If a random sample of size n = 25 is taken from a continuous and symmetric distribution with a mean , which of the following would be an unbiased estimator for ?
 

  a.the median,
  b.All of these answers.
  c.the trimmed mean,
  d.the mean,


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strudel15

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

correct: c

Answer to Question 2

correct: b


abc

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Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

daiying98

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

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