Francis Roman
5.5
a. It has a positive association because as the pulse before marching goes up, so does the
pulse after marching.
b. I believe the pattern of this plot is more linear than curvilinear. Using a straight line to
describe this plot would be more exact. There is no real curve.
c. I don’t believe there are any OBVIOUS outliers in this plot.
5.7
a.
The speed of the car is the explanatory variable and the response variable is the
distance it takes to stop after applying brakes.
b.
speed
distance
70
60
50
40
30
20
10
0
400
300
200
100
0
Scatterplot of distance vs speed
5.13
a. The slope is 1.01. As the latitude of the city increases the mean average temperature
for the city decreases because the slope is negative. And vice versa.
b. y=113.61.01(32) Temperature=81.3 degrees
c. San Francisco mean temperature is 75.2 degrees. Prediction error 6475.2=11.2
d. We can’t use this equation for 0 latitude because the slope will have no affect on the
mean average temperature. If we did use the equation, the y intercept would be the
temperature at 113.6 degrees.
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 Fall '08
 BARROSO,JOAOR
 Statistics, Mean, Francis Roman, mean average temperature

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