If the coefficient of correlation is .8, the percentage of ...

[oliviahorn72]

If the coefficient of correlation is .8, the percentage of variation in the dependent variable explained by the variation in the independent variable is
 a. .80.
  b. 80.
  c. .64.
  d. 64.

Question 2

A major department store has determined that its customers charge an average of 500 per month, with a standard deviation of 80 . Assume the amounts of charges are normally distributed.
 a. What percentage of customers charges more than 380 per month?
  b. What percentage of customers charges less than 340 per month?
  c. What percentage of customers charges between 644 and 700 per month?

[tashiedavis420]

Answer to Question 1

d

Answer to Question 2

a. 93.32
b. 2.28
c. 2.97

[oliviahorn72]

Thanks for the timely response, appreciate it

[cpetit11]

Excellent