If the null hypothesis is true, then the alternative hypothesis ...

[jman1234]

If the null hypothesis is true, then the alternative hypothesis _____.
 
  a. must also be true c. might be true
  b. cannot be true d. cannot say

Question 2

If my alternative hypothesis states that people who practice the task for 30 minutes before being tested will perform differently than people who get no practice prior to being tested, then my null hypothesis will state that _____.
 
  a. people who get no practice before the test will do better than those who practice
  b. people who get no practice before the test will do worse than those who get practice
  c. people who get no practice will perform no differently than those who get practice
  d. people who get no practice will perform differently than those who get practice

[ngr69]

Answer to Question 1

B
The null and alternative hypotheses are mutually exclusive. If one is true the other cannot be true.

Answer to Question 2

C
The null hypothesis states that no effect will occur when the independent variable is manipulated.

[jman1234]

Thanks for the timely response, appreciate it

[komodo7]

Great answer, keep it coming