If a psychologist tests whether there is any difference between ...

[debasdf]

If a psychologist tests whether there is any difference between how fast people work in the morning versus how fast they work in the evening, the null hypothesis is that
 
  A) people who work in the morning work faster.
  B) people who work at night work faster.
  C) there is a difference in worker speed, but no prediction is made.
  D) there is no difference in the speed at which people work.

Question 2

When the results of a t test are presented in a research article, the number(s) in parentheses that directly follow the t score is(are) the __________.
 
  Fill in the blanks with correct word

[Pamela.irrgang@yahoo.com]

Answer to Question 1

D

Answer to Question 2

degrees of freedom, df

[debasdf]

TYSM

[epscape]

Gracias!