Which of the following is the correct null hypothesis for an independent-measures t test?

Which of the following is the correct null hypothesis for an independent-measures t test?
 
  A) 1 - 2 = 0
  B) M1 - M2 = 0
  C) 1 - 2  0
  D) M1 - M2  0

Question 2

A sample with modes of 4, 8, and 10 is said to be multimodal.
 
  Indicate whether the statement is true or false

Question 3

Researchers conduct a hypothesis test and use the data from two separate sets of observations drawn from the same group of participants. Their research design is called a repeated-measures research design or a(n)____.
 
  A) independent-measures design
  B) dependent-measures design
  C) between-subjects design
  D) within-subjects design

Question 4

A sample has n = 5 scores: 2, 4, 5, 8, and 11. The median for the sample is 6.5.
 
  Indicate whether the statement is true or false