#1) Consider the following table summarizing the speed limit of a certain road and the number...

#1) 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	48	43	35	22	20
Reported Number of Accidents	25	29	25	17	19	14

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

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

c) Predict the number of reported accidents for a posted speed limit of 43mph. Round to the nearest whole number.

#2) Consider the following:

X	37	60	73	104	124
Y	205	228	170	121	105

a) What is slope of the regression line predicting Y from X, rounded to 2 decimal places?

b) What is the intercept of the regression line predicting Y from X, rounded to 2 decimal places?

c) What is the correlation between X and Y, rounded to 2 decimal places?

Solutions

Expert Solution

slope =0.376

intercept =7.794

predicted value =7.794+0.376*43=23.962 ~24

a) slope =-1.40

b) intercept =276.85

c)correlation coefficient =-0.92

orchestra answered 10 months ago

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