Which of the following can be accomplished by a regression study?
a. All of these answers.
b. The prediction equation can be used to predict a reasonable range of values for future values of the dependent variable.
c. Estimate the amount of variability or uncertainty around the equation.
d. Identify unusual points far from the predicted value.
Question 2
Out-of control indicators may include a number of conditions. What is not one of these?
a. at least 8 upward (or downward) consecutive changes
b. at least 8 consecutive points above (or below) the centerline
c. at least 1 point beyond two standard deviations from the centerline
d. at least 4 of 5 consecutive points beyond one standard deviation from the centerline
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