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Author Question: A test of sobriety involves measuring the subject's motor skills. Twenty randomly selected sober ... (Read 53 times)

kwoodring

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on: Aug 1, 2018
A test of sobriety involves measuring the subject's motor skills.
 
  Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.7. At the 0.01 level of significance, test the claim that the true mean score for all sober subjects is equal to 35.0.

Question 2

If r(20) = +.21, p > .05 for variables X and Y, then the best prediction of a Y score from an X score is .
 
  a. the value of X
  b. the value of X - Y
  c. the value of Y
  d. 1.00


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prumorgan

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Reply #1 on: Aug 1, 2018
Answer to Question 1

Test statistic: t = 7.252. Critical values: t = -2.861, 2.861. Reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the mean is equal to 35.0.

Answer to Question 2

C


kwoodring

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Reply 2 on: Aug 1, 2018
Excellent

apple

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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