Crown Rump Length Refer to Exercise 14 54 90 Procedure 14 2 Regression t Interval
Crown-Rump Length. Refer to Exercise 14.54; 90%.
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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