If the hypothesis is a one-tailed hypothesis, how can the ...

[danielfitts88]

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]

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.

[danielfitts88]

TYSM

[scottmt]

Gracias!