Math 1040 Statistical Study
#4
The study is due on Thursday, November ?
Linear Correlation and Regression
Sections 9-2 and 9-3 in the textbook introduce the basic concepts of linear correlation and
regression. The basic objective is to use sample paired data to determine whether there is a
relationship between two variables and, if so, identify what the relationship is.
Study #4:
Listed in the table are the heights (in inches) and weights (in pounds) for supermodels Niki
Taylor, Nadia Avermann, Claudia Schiffer, Elle MacPherson, Christy Turlington, Bridget Hall,
Kae Moss, Valerie Mazza, and Kristy Hume.
Height
(inches)
71 70.5 71 72 70 70 66.5 70 71
Weight
(pounds)
125 119 128 128 119 127 105 123 115
Using Statdisk (Analysis, Correlation and Regression, Evaluate), answer the following
questions.
1. Is there a correlation between height and weight of these nine supermodels? ________
2. If there is a correlation, does it mean that there is a correlation between height and weight of
all adult women? Explain in one or two sentences.
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
3. What is the equation of the regression line? ______________________________________
4. Find the best predicted weight of a supermodel who is 69 inches tall.
__________ pounds
