The following scatter plot was made from a random sample of 500 adult males. The x-axis is height in inches. The y-axis is weight in pounds. The equation of best fit line and the correlation coefficient (r) is also given. 61 63 65 67 69 71 73 75 77 Height (inches)
Q6
The following
males. The x-axis is height in inches. The y-axis is weight in pounds. The equation
of best fit line and the
61 63 65 67 69 71 73 75 77
Height (inches)
140
160
180
200
220
240
Weight (lbs)
y = 5.815x + -213.594
r = 0.85
Height vs. Weight for 500 alult males
(a) Is it true that the tallest of the 500 men also weighs the most?
(b) Use the equation of the line of best fit to predict the weight of a man who is 72
inches tall.
(c) Would it be appropriate to use this equation to predict the weight of a man
who is 6 foot 6 inches tall? Why or why not?
(d) Guess the correlation coefficients for the following scatter plots.
0 20 40 60 80
76
38
0
38
76
r = ?
0 20 40 60 80
76
13
50
113
176
r = ?
0 20 40 60 80
3
38
79
120
161
r = ?
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