Concept explainers
To find the correct 95% confidence interval for the slope of the regression line.
Answer to Problem 28PT4
Explanation of Solution
Given:
Formula:
Confidence interval for slope is,
The confidence level = 0.95
So, level of significance =
First need to find critical t value.
tc = 2.306 …Using excel formula, =TINV(0.05,8)
Using formula, 95% confidence interval for the slope of the regression line.
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