As a general rule, the normal distribution is used to approximate ...

[j.rubin]

As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion only if:
 a. the sample size n is greater than 30.
  b. the population proportion p is close to 0.50.
  c. the underlying population is normal.
  d. np and n(1 - p) are both greater than or equal to 5.

Question 2

If the coefficient of correlation is 0.90, then the percentage of the variation in the dependent variable y that is explained by the variation in the independent variable x is:
 a. 90
  b. 81
  c. 95
  d. None of these choices.

[ApricotDream]

Answer to Question 1

D

Answer to Question 2

B

[j.rubin]

Thanks for the timely response, appreciate it

[carlsona147]

Gracias!