One sample is selected to represent scores in treatment 1 and a ...

[vHAUNG6011]

One sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment 2 . Which set of sample statistics would present the clearest picture of a real difference between the two treatments?
 
  a. M1 = 36, M2 = 40, and both variances = 43
  b. M1 = 36, M2 = 40, and both variances = 6
  c. M1 = 38, M2 = 40, and both variances = 43
  d. M1 = 38, M2 = 40, and both variances = 6

Question 2

There is a 6-point difference between two sample means. If the two samples have the same variance, which of the following values would make the mean difference easiest to see in a graph showing the two distributions?
 
  a. s2 = 2 c. s2 = 16
  b. s2 = 8 d. s2 = 64

[dpost18]

Answer to Question 1

B

Answer to Question 2

A