Which of the following is NOT an assumption for the simple linear regression model?
A) The individual error terms are statistically independent.
B) The distribution of the error terms will be skewed left or right depending on the shape of the dependent variable.
C) The error terms have equal variances for all values of the independent variable.
D) The mean of the dependent variable value for all levels of x can be connected by a straight line.
Question 2
It is entirely possible for the R-chart to show that a process is in statistical control and the -chart to show that the same process is out of control.
Indicate whether the statement is true or false
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