If you were going to develop a scatter plot for the purpose of determining whether one of the assumptions of the regression model is being satisfied, which of the following is true?
A) The plot should illustrate a bell-shaped distribution to show that the residuals are normally distributed.
B) The horizontal axis should show the fitted values for the dependent variable.
C) The plot should illustrate a cone shaped look.
D) The points should fall in a straight line.
Question 2
Each evening, a nationwide retail chain randomly calls 100 of the customers who came to their store that day to ask whether they were satisfied with the service they had received. The customers respond yes or no.
Suppose the company has found over time that 8 percent of the customers are not satisfied (no answers), what is the 3-sigma upper and lower control limits for the appropriate control chart?A) About .053 and .107
B) 0 to about .16
C) -.0.14 to about .16
D) About -1.96 to 1.96
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