Question: The summary statistics for a certain set of points are: n = 20, se = 4.65, (x x)2 = 118.26, and b1 = 1.62.

The summary statistics for a certain set of points are: n = 20, se = 4.65, ∑(x − x̄)2 = 118.26, and b1 = 1.62. Assume the conditions of the linear model hold. A 99% confidence interval for β1 will be constructed.

a. How many degrees of freedom are there for the critical value?

b. What is the critical value?

c. What is the margin of error?

d. Construct the 99% confidence interval.

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