Author Question: If the hypothesis is a one-tailed hypothesis, how can the experimenter determine whether the results ... (Read 29 times)

danielfitts88 · **on:** Jun 19, 2018

If the hypothesis is a one-tailed hypothesis, how can the experimenter determine whether the results are in the correct direction for a pretest posttest design? The experimenter checks the _____.

a. absolute value of the obtained t c. pretest and posttest means
b. sign of the obtained t d. all of these

Question 2

In order to find the critical value of t in the table, we need to know _____.

a. whether the hypothesis is one-tailed or two-tailed
b. alpha
c. the degrees of freedom
d. all of these

kswal303 · **Reply #1 on:** Jun 19, 2018

Answer to Question 1

C
If the larger mean corresponds to the mean that was predicted to be larger, then the result is in the correct direction. The value of related t is always positive

Answer to Question 2

D
The critical value of t depends of all of these things, whether the design is an independent groups design or a repeated measures design.