Business Statistics Assignment Do questions 2, 3, and 4 (attached)Show all workMust be typed 2. Given are five observations for two variables, x and y. ? 3

Business Statistics Assignment Do questions 2, 3, and 4 (attached)Show all workMust be typed 2. Given are five observations for two variables, x and y.
?
3 12
6 20 14.
Yi
55 40 55 10 15
a. Develop a scatter diagram for these data.
Answer
b. What does the scatter diagram developed in part (a) indicate about the relationship
between the two variables?
Answer
c. Try to approximate the relationship between x and y by drawing a straight line
through the data.
Answer
d. Develop the estimated regression equation by computing the values of bo and by using
equations (14.6) and (14.7).
Answer
e. Use the estimated regression equation to predict the value of y when x = 10.
Answer
3. Given are five observations collected in a regression study on two variables.
Xi
2
6
9 13 20
Yi
7 18
9 26 23
a. Develop a scatter diagram for these data.
b. Develop the estimated regression equation for these data.
c. Use the estimated regression equation to predict the value of y when x = 6.
SELFtest
4. The following data give the percentage of women working in five
companies in the retail and trade industry. The percentage of
management jobs held by women in each company is also shown.
67
73
21
% Working
45 54 61
% Management 49 65 47 33
a. Develop a scatter diagram for these data with the percentage of women working in the
company as the independent variable.
Answer
b. What does the scatter diagram developed in part (a) indicate about the relationship
between the two variables?
Answer
c. Try to approximate the relationship between the percentage of women working in the
company and the percentage of management jobs held by women in that company.
Answer
d. Develop the estimated regression equation by computing the values of bo and bi.
Answer
e. Predict the percentage of management jobs held by women in a company that has
60% women employees.

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