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Author Question: A study of matched pairs of participants reported the results of a related measures t test. If there ... (Read 29 times)

crazycityslicker

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on: Jun 19, 2018
A study of matched pairs of participants reported the results of a related measures t test. If there were 25 participants in one condition and 25 participants in the other conditions, how many degrees of freedom were there?
 
  a. 23 c. 48
  b. 24 d. 49

Question 2

In a pretest posttest design, there are 15 participants who each take both the pretest and posttest. How many degrees of freedom are present?
 
  a. 12 c. 14
  b. 13 d. 15


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gabrielle_lawrence

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Reply #1 on: Jun 19, 2018
Answer to Question 1

B
For a related measures t test, df = N - 1, where N equals the number of paired scores.

Answer to Question 2

C
There are 15 difference scores (N). df = N - 1


crazycityslicker

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Reply 2 on: Jun 19, 2018
YES! Correct, THANKS for helping me on my review

yeungji

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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