AP Statistics teachers from across the country meet annually in Kansas City to score AP Statistics exams. One social event that many teachers participate in is the annual Prediction Fun Run. Prior to the
race, the teachers predict how long it will take them to complete the 1.96-mile long course. During the
event, they are times and their actual finishing
2000
Actual Time (Seconds)
1.500
1.000
500
500
1.000
1.500 2000
Predicted Time (Seconds)
2.500
3.000
The winner of the race is not the fastest runner, but the most accurate runner
a) Letx=the runner's predicted time (in seconds) and y = the runner's actual time (in seconds)
Provide the equation of the line that can be used to assess how accurate the runners were. Plot
this line on the graph above. Clearly label two points you are using to plot the line.
b) is the line you drew in part (a) a least squares regression line for these data? Explain