A set of 10 scores has SS = 90. If the scores are a sample, the sample variance is ____ and if the ...

A set of 10 scores has SS = 90. If the scores are a sample, the sample variance is ____ and if the scores are a population, the population variance is ____.
 
  A) s2 = 9; 2 = 9
  B) s2 = 9; 2 = 10
  C) s2 = 10; 2 = 9
  D) s2 = 10; 2 = 10

Question 2

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment. For this study, the three sample means are, M1 = 1, M2 = 2, and M3 = 3. For the ANOVA, what value would be obtained for SSbetween?
 
  A) 1
  B) 5
  C) 10
  D) 15

Question 3

A sample of n = 25 scores has mean M = 20 and variance s2 = 9. What is the sample standard deviation?
 
  A) 3
  B) 4.5
  C) 9
  D) 81

Question 4

A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the treatments had the same number of participants, then how many individuals were in each treatment?
 
  A) 11
  B) 12
  C) 13
  D) 14