In Exercise 1.61 we described an informal experiment conducted at McNair Academic High School in Jersey City,
Question:
MINITAB output for Exercise 12.28
Regression Analysis: y versus x
The regression equation is
y = -26.8 + 1.26 x
a. Construct a scatterplot for the data. Does the assumption of linearity appear to be reasonable?
b. What is the equation of the regression line used for predicting final exam score as a function of the posttest score?
c. Do the data present sufficient evidence to indicate that final exam score is linearly related to the posttest score? Use a = .01.
d. Find a 99% confidence interval for the slope of the regression line.
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Related Book For
Introduction To Probability And Statistics
ISBN: 9781133103752
14th Edition
Authors: William Mendenhall, Robert Beaver, Barbara Beaver
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