A researcher wishes to examine the relationship between years of schooling completed and the number of pregnancies in young women. Her research discovers a linear relationship, and the least squares line is:    ˆy=3−5x    where x is the number of years of schooling completed and y is the number of pregnancies.  The slope of the regression line can be interpreted in the following way: When amount of schooling increases by one year, the number of pregnancies tends to decrease by 3.   When amount of schooling increases by one year, the number of pregnancies tends to decrease by 5.   When amount of schooling increases by one year, the number of pregnancies tends to increase by 5.   When amount of schooling increases by one year, the number of pregnancies tends to increase by 3.

MATLAB: An Introduction with Applications
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A researcher wishes to examine the relationship between years of schooling completed and the number of pregnancies in young women. Her research discovers a linear relationship, and the least squares line is:    ˆy=3−5x

   where x is the number of years of schooling completed and y is the number of pregnancies.  The slope of the regression line can be interpreted in the following way:

  • When amount of schooling increases by one year, the number of pregnancies tends to decrease by 3.

     

  • When amount of schooling increases by one year, the number of pregnancies tends to decrease by 5.

     

  • When amount of schooling increases by one year, the number of pregnancies tends to increase by 5.

     

  • When amount of schooling increases by one year, the number of pregnancies tends to increase by 3.

     

Match each scatterplot shown below with one of the four specified correlation coefficients.
Ò
O
O
O
O
O
900
0008
O
Q
a. 0.27
b. -0.09
c. 0.76
d. -0.88
Transcribed Image Text:Match each scatterplot shown below with one of the four specified correlation coefficients. Ò O O O O O 900 0008 O Q a. 0.27 b. -0.09 c. 0.76 d. -0.88
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