Under what circumstances is the point-biserial correlation used? ...

[urbanoutfitters]

Under what circumstances is the point-biserial correlation used?
 
  A) in the same circumstances when a repeated-measures t test would be used
  B) when X consists of regular, numerical scores but Y is dichotomous
  C) when both X and Y are dichotomous variables
  D) when both X and Y are measured on an ordinal scale (ranks)

Question 2

A sample from a population with  = 40 and  = 10 has a mean of M = 44. If the sample mean corresponds to a z = 2.00, then how many scores are in the sample?
 
  A) n = 100
  B) n = 25
  C) n = 5
  D) n = 4

[mcinincha279]

Answer to Question 1

B

Answer to Question 2

B

[urbanoutfitters]

TYSM

[bassamabas]

Excellent