Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Chapter R, Problem 2.27RE
a.
To determine
Find the percent of variation in January temperature can be explained by variation in Latitude.
b.
To determine
Explain the indication of the fact that the
c.
To determine
Obtain the equation of the line of regression for predicting average January temperature from latitude.
d.
To determine
Explain the meaning of slope.
e.
To determine
Explain whether the meaning of y-intercept is meaningful.
f.
To determine
Predict the mean January temperature for the latitude of Denver of
g.
To determine
Explain the meaning if the residual for the city is positive.
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Students have asked these similar questions
Winter in the city Summary statistics for the data relat-ing the latitude and average January temperature for 55
large U.S. cities are given below.
a) What percent of the variation in January Temperaturescan be explained by variation in Latitude?b) What is indicated by the fact that the correlation isnegative?
c) Write the equation of the line of regression for predict-ing January Temperature from Latitude.
d) Explain what the slope of the line means.e) Do you think the y-intercept is meaningful? Explain.f) The latitude of Denver is 40° N. Predict the meanJanuary temperature there.g) What does it mean if the residual for a city is positive?
Variable Mean StdDevLatitude 39.02 5.42JanTemp 26.44 13.49Correlation = -0.848
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a. 130
b. 1.3
c. 82
d. 0.82
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and the duration of the ride (in seconds). A regression topredict Duration from Drop has R2 = 15.2,.a) What are the variables and units in this regression?b) What units does the slope have?c) Do you think the slope is positive or negative? Explain.
Chapter R Solutions
Intro Stats
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