Question
For questions 20-24: Management believes that more employees a donut store has the more total profit a store willhave,and they have decided to conduct a
For questions 20-24: Management believes that more employees a donut store has the more total profit a store willhave,and they have decided to conduct a linear regression analysis using data from twenty stores.
20)What is the slope of the linear regression equation?
A.9.71
B.588.15
C.0.13
D.0.016
21)What is the coefficient of determination?
A.9.71
B.588.15
C.0.13
D.0.016
22)Management is considering opening a new store with 5 employees.What is the expected total profit?
A.725.25
B.636.70
C.425.18
D.125.62
23)Management wants to ensure they have agoodmodel to predict total profit.Which of the following statements best describes their findings?
A.For coefficient of determination - cannot reject the null hypothesis at the 0.05 level
B.For coefficient of determination -can reject the null hypothesis at the 0.05 level
C.The 95% confidence interval for the slope -28.27 to 47.69 - this range which includes 0 indicates good results
D.The 95% confidence interval for the slope -28.27 to 47.69 - this range which includes 0 indicates bad results
E.Both A and D are correct
24)What is the 95% confidence interval for total profit if a new store has 5 employees?
A.499 to 774
B.137 to 774
C.137 to 499
D.137 to 1136
25)Management believes pastry sales significantly contributes to the variability in total profit.What percent of variability in total profit is explained by profit from pastry sales?
A.28.4%
B.18.8%
C.3.5%
D.81.3%
26)True of false: A linear regression model that is statistically significant is sufficient to prove causation.
A.True
B.False
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