AP Statistics 2017

(Marvins-Underground-K-12) #1


  1.      The fertility   rate    (average    number  of  children    per woman)  in  a   country can be  used    to  predict the life

    expectancy of people in that country. The regression equation in 2012 was = 85 –5.14x , where y is
    the life expectancy in years and x is the number of children per woman. The correlation is 0.806.
    What percent of the variation in life expectancy is explained by the regression model with fertility
    rate as the predictor?
    (A) 5.14%
    (B) 65.0%
    (C) 80.6%
    (D) 85.0%
    (E) There is not enough information to answer this question.




Answers


1. C

2. B

3. D

4. D

5. B
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