4. The accompanying table shows the manufacturer's suggested retail price (MSRP), the highway miles per gallon (mpg), and the weight for each case in two different samples of vehicles. The top half of the table shows a random sample of five models of family sedans (which rules out luxury cars, sport cars, and convertibles), and the bottom half shows a simple random sample of five models of sport utility vehicles (SUVs).
4. The accompanying table shows the manufacturer's suggested retail price (MSRP), the highway miles per gallon (mpg), and the weight for each case in two different samples of vehicles. The top half of the table shows a random sample of five models of family sedans (which rules out luxury cars, sport cars, and convertibles), and the bottom half shows a simple random sample of five models of sport utility vehicles (SUVs).
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
Transcribed Image Text:4. The accompanying table shows the manufacturer's suggested retail price (MSRP), the
highway miles per gallon (mpg), and the weight for each case in two different
samples of vehicles. The top half of the table shows a random sample of five models
of family sedans (which rules out luxury cars, sport cars, and convertibles), and the
bottom half shows a simple random sample of five models of sport utility vehicles
(SUVs).
2
a. Estimate the difference in mean model price between family sedans and
SUVs and an approximate 95% confidence interval.
b.
Estimate the difference in mean model weight between family sedans and
SUVs and an approximate 95% confidence interval.
c. Estimate the difference in mean highway mpg between family sedans and
SUVs and an approximate 95% confidence interval.
d.
In which of the confidence intervals in this exercise do you have the least
"confidence"? Explain.
Transcribed Image Text:Sedans
Buick Century Custom
Chevrolet Malibu
Chrysler Concorde LX
Ford Taurus LX
Toyota Camry LE
SUVS
Blazer 4WD LX
Explorer AWD XLT
Jimmy 4WD SLT
Trooper S 4 x 4
Grand Cherokee 4WD
MSRP
(dollars)
20,020
17,150
22,510
18,550
20,415
26,905
30,185
30,225
27,920
35,095
Mpg
highway
29
29
28
27
32
20
19
20
19
20
Weight
(pounds)
3368
3051
3488
3354
3120
4049
4278
4170
4465
4024
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