If n = 15 for each sample, which of the following sets of data ...

[cmoore54]

If n = 15 for each sample, which of the following sets of data provides the clearest difference between the two samples?
 
  A) A sample mean difference of 5 points with s2 = 5 for both samples
  B) A sample mean difference of 5 points with s2 = 10 for both samples
  C) A sample mean difference of 10 points with s2 = 5 for both samples
  D) A sample mean difference of 10 points with s2 = 10 for both samples

Question 2

A grouped frequency distribution table lists one interval as, 20-29. The width of this interval is 9 points.
 
  Indicate whether the statement is true or false

[Silverbeard98]

Answer to Question 1

C

Answer to Question 2

False