Assignment:
A safety researcher has measured the speed of automobiles passing his vantage point near an interstate highway. He has also recorded the number of occupants and whether the driver was wearing a seat belt. The data are shown in the following table with seat belt users coded as 1, nonusers as 0. Using a computer statistical package, carry out a multiple regression analysis on these data, interpret the partial regression coefficients, and discuss the results of each significance test.
|
y = speed (mph):
|
61
|
63
|
55
|
59
|
59
|
52
|
61
|
|
x1 = occupants:
|
2
|
1
|
2
|
1
|
3
|
1
|
2
|
|
x2 = belt usage:
|
1
|
1
|
1
|
0
|
0
|
1
|
0
|
|
y = speed (mph):
|
51
|
57
|
55
|
54
|
49
|
61
|
73
|
|
x1 = occupants:
|
2
|
2
|
2
|
3
|
1
|
1
|
1
|
|
x2 = belt usage:
|
1
|
1
|
1
|
0
|
1
|
1
|
0
|
Provide complete and step by step solution for the question and show calculations and use formulas.