A population has = 50 and = 5. If 10 points are added to every score in the population, then what ...

A population has  = 50 and  = 5. If 10 points are added to every score in the population, then what are the new values for the mean and standard deviation?
 
  A)  = 50 and  = 5
  B)  = 50 and  = 15
  C)  = 60 and  = 5
  D)  = 60 and  = 15

Question 2

In an analysis of variance, which value is determined by the size of the sample variances?
 
  A) SSbetween
  B) SSwithin
  C) dfbetween
  D) dfwithin

Question 3

Which set of scores has the smallest standard deviation?
 
  A) 11, 17, 31, 53
  B) 5, 11, 42, 22
  C) 145, 143, 145, 147
  D) 27, 105, 10, 80

Question 4

What is the purpose for post tests?
 
  A) to determine whether or not a Type I error was committed
  B) to determine how much difference exists between the treatments
  C) to determine which treatments are significantly different
  D) to determine whether or not the sample is normally distributed