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Author Question: As a general rule, the normal distribution is used to approximate the sampling distribution of the ... (Read 185 times)

j.rubin

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on: Jun 24, 2018
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.


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ApricotDream

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Reply #1 on: Jun 24, 2018
Answer to Question 1

D

Answer to Question 2

B


j.rubin

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Reply 2 on: Jun 24, 2018
Excellent

jamesnevil303

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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