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Author Question: Why is it preferable to choose a one-sided alternative rather than a two-sided alternative in the ... (Read 83 times)

clmills979

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on: Jul 24, 2018
Why is it preferable to choose a one-sided alternative rather than a two-sided alternative in the situation where you are only interested in results that are extreme in one direction?
 a. Your p-value would be half as much as it would be for a two-sided test (assuming the test statistic is the same each time, and is in the direction of the one-sided alternative you selected.)
  b. Your results don't have to be as extreme in order to achieve statistical significance.
  c. Your conclusions can be more informative because they will have a direction associated with them.
  d. All of the above.

Question 2

Suppose your test statistic for a two-sided test for the difference in two means resulted in a standard score of 0 . What would the resulting p-value be?
 a. 0
  b. .5
  c. 1
  d. Not enough information to tell.


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whitcassie

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

D

Answer to Question 2

C


clmills979

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Reply 2 on: Jul 24, 2018
Gracias!

sultana.d

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Reply 3 on: Yesterday
Excellent

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