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Author Question: When should a t statistic be used? a.When the mean is known but the standard deviation is ... (Read 110 times)

sjones

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  When should a t statistic be used?
 

  a.When the mean is known but the standard deviation is unknown and must be estimated by s.
  b.When the standard deviation is known but the mean is unknown and must be estimated by .
  c.When both the mean is known and the standard deviation is known.
  d.When both the mean is unknown and must be estimated by and the standard deviation is unknown and must be estimated by s.

Question 2


  Suppose a random sample of 10 televisions has a mean life of 25 years. If it is known that , what is the test statistic for testing H0: and Ha: ?
  a.-2.66
  b.There is not enough information given to determine the test statistic.
  c.0.60
  d.0.004
 



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Meganchabluk

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Answer to Question 1

correct: d

Answer to Question 2


correct: a




sjones

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


vickybb89

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Reply 3 on: Yesterday
Wow, this really help

 

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