Consider the following pairs of measurements: x -2 0 2 4 6 8 10 y 0 3
Question:
Consider the following pairs of measurements: x -2 0 2 4 6 8 10 y 0 3 2 3 8 10 11
a. Construct a scatterplot for these data.
b. Find the least squares line and plot it on your scatterplot.
c. Find s2 and s.
d. Find a 90% confidence interval for the mean value of y when x = 3. Plot the upper and lower bounds of the confidence interval on your scatterplot.
e. Find a 90% prediction interval for a new value of y when x = 3. Plot the upper and lower bounds of the prediction interval on your scatterplot.
f. Compare the widths of the intervals you constructed in parts d and
e. Which is wider and why?
Step by Step Answer:
Related Book For
Statistics For Business And Economics
ISBN: 9781292413396
14th Global Edition
Authors: James McClave, P. Benson, Terry Sincich
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