A confidence interval is defined as:
a. a point estimate plus or minus a specific confidence level.
b. a lower and upper confidence limit associated with a specific level of confidence.
c. an interval that has a 95 probability of containing the population parameter.
d. a lower and upper confidence limit that has a 95 probability of containing the population parameter.
Question 2
For a multiple regression model the following statistics are given: Total variation in y = 250, SSE = 50, k = 4, and n = 20 . Then, the coefficient of determination adjusted for the degrees of freedom is:
a. 0.800 c. 0.840
b. 0.747 d. 0.775
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