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Refer to Exercise 14 50 95 Procedure 14 2 Regression t Interval Procedure Purpose To find

Refer to Exercise 14.50; 95%.

Procedure 14.2

Regression t-Interval Procedure

Purpose To find a confidence interval for the slope, β1, of the population regression line

Assumptions The four assumptions for regression inferences

Step 1: For a confidence level of 1 − α, use Table IV to find tα/2 with df = n − 2.

Step 2: The endpoints of the confidence interval for β1 are β1 ± tα/2 .se/√Sxx

Step 3: Interpret the confidence interval.

Procedure 14.2

Regression t-Interval Procedure

Purpose To find a confidence interval for the slope, β1, of the population regression line

Assumptions The four assumptions for regression inferences

Step 1: For a confidence level of 1 − α, use Table IV to find tα/2 with df = n − 2.

Step 2: The endpoints of the confidence interval for β1 are β1 ± tα/2 .se/√Sxx

Step 3: Interpret the confidence interval.

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