1. A regression was done for 20 cities with the latitude (Latitude), a measurement of the distance of a location on the Earth from the equator in degrees and the average January temperatures (Temp) as the dependent variable measure in °F. The regression equation is Temp = 48.4 – 0.31 × Latitude d) If the actual average January temperature for a latitude of 45 degrees in theses 20 cities is 40°F, use part (c) to calculate the residual and state whether we have underestimated or overestimated.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 91E
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1. A regression was done for 20 cities with the latitude (Latitude), a measurement of the distance of a
location on the Earth from the equator in degrees and the average January temperatures (Temp) as the
dependent variable measure in °F. The regression equation is
Temp = 48.4 – 0.31 × Latitude
d) If the actual average January temperature for a latitude of 45 degrees in theses 20 cities is 40°F, use
part (c) to calculate the residual and state whether we have underestimated or overestimated.
Transcribed Image Text:1. A regression was done for 20 cities with the latitude (Latitude), a measurement of the distance of a location on the Earth from the equator in degrees and the average January temperatures (Temp) as the dependent variable measure in °F. The regression equation is Temp = 48.4 – 0.31 × Latitude d) If the actual average January temperature for a latitude of 45 degrees in theses 20 cities is 40°F, use part (c) to calculate the residual and state whether we have underestimated or overestimated.
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