A population of scores has = 80. In this population, a score of X = 86 corresponds to z = +2.00. ...

A population of scores has  = 80. In this population, a score of X = 86 corresponds to z = +2.00. What is the population standard deviation?
 
  A) 2
  B) 3
  C) 6
  D) 12

Question 2

For independent-measures ANOVA, individual differences contribute to the variance in the numerator and in the denominator of the F-ratio. What happens to the individual differences in the numerator of the F-ratio for repeated-measures ANOVA?
 
  A) They do not exist because the same individuals participate in all of the treatments.
  B) They are measured and subtracted out in the analysis process.
  C) They contribute to the variance in the numerator.
  D) They are amplified in the numerator of the ratio.

Question 3

A population of scores has  = 44. In this population, a score of X = 40 corresponds to z = -0.50. What is the population standard deviation?
 
  A) 2
  B) 4
  C) 8
  D) -8

Question 4

If other factors are held constant, the larger the difference between the two sample means is, the larger the value for the independent-measures t statistic will be.
 
  Indicate whether the statement is true or false

Question 5

A population distribution has  = 6. What position in this distribution is identified by a z-score of z = +2.00?
 
  A) two points above the mean
  B) two points below the mean
  C) twelve points above the mean
  D) twelve points below the mean