The letter in the formula for constructing a confidence interval estimate of the population mean is:
a. the level of confidence.
b. the probability that a particular confidence interval will contain the population mean.
c. the area in the lower tail of the sampling distribution of the sample mean.
d. None of these choices.
Question 2
In a multiple regression analysis involving k independent variables and n data points, the number of degrees of freedom associated with the sum of squares for error is:
a. k - 1 c. n - 1
b. n - k d. n - k - 1
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