Question

Consider the following table summarizing the speed limit of a certain road and the number of accidents occurring on that road in January.

Posted Speed Limit	51	46	43	36	22	24
Reported Number of Accidents	26	25	22	15	17	13

1) Find the slope of the regression line predicting the number of accidents from the posted speed limit.Round to 3 decimal places.

2) Find the intercept of the regression line predicting the number of accidents from the posted speed limit. Round to 3 decimal places.

3) Predict the number of reported accidents for a posted speed limit of 19mph. Round to the nearest whole number.

Answer 1

The statistical software output for this problem is :

1)

slope = 0.398

2)

Intercept = 4.929

3)

The number of reported accidents = 12