Draw scatter diagram and find correlation coefficient
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Car Weight MPG
1 3775 19
2 3964 17
3 3530 21
4 3175 22
5 2580 27
6 3730 18
7 2605 26
8 3772 17
9 3310 20
10 2991 25
11 2752 26
If car we add a car 12 that weighs 3305 lbs and gets 19 mpg complete parts A through E
A) Draw a scatter diagram
B)Compute the linear correlation coefficient with car 12 included
C) compare the linear correlation coefficient of part b with the linear correlation coefficient for the original data (for the original data linear correlation coefficient r= -.972) Why are results reasonable?
Because car 12 is a hybrid car
because car 12 does not follow the overall pattern of data
because car 12 follows the overall pattern of data
D) Suppose car 13 replaces car 12 on the original set of data. Car 13 weighs 2890 pounds and gets 60 miles per gallon. Construct a scatter diagram to show info
E) compute the linear correlation coefficient with car 13 included round to three decimal places
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