A normal distribution has = 80 and = 10. What is the probability of randomly selecting a score ...

A normal distribution has  = 80 and  = 10. What is the probability of randomly selecting a score greater than 90 from this distribution?
 
  A) p = 0.8413
  B) p = 0.1587
  C) p = 0.3085
  D) p = 0.6915

Question 2

Which of the following is used to calculate the degrees of freedom for the A x B interaction?
 
  A) dfbetween. treatments - dfA - dfB
  B) dfA - dfB
  C) dfwithin - (dfA + dfB)
  D) dfbetween. treatments - dfwithin treatments

Question 3

A normal distribution has a mean of  = 40 with  = 10. What proportion of the scores in this distribution are smaller than X = 35?
 
  A) 0.3085
  B) 0.6915
  C) 0.0668
  D) 0.9332

Question 4

A two-factor, independent-measures research study is evaluated using an analysis of variance. The F-ratio for factor A has df = 1, 40 and the F-ratio for factor B has df = 3, 40. Based on this information, what are the df values for the A x B interaction?
 
  A) df = 2, 40
  B) df = 3, 40
  C) df = 4, 40
  D) df = 7, 40