Author Question: Tenused cars from a rental fleet are randomly selected. Each vehicles annual maintenance cost from ... (Read 65 times)

Apple716 · **on:** Feb 26, 2023

Ten used cars from a rental fleet are randomly selected. Each vehicle’s annual maintenance cost from the previous calendar year (y) is recorded as well as the vehicle’s current mileage (x). A simple linear regression is conducted on the data.

The regression equation is

Maint = 297 + 0.00636 Miles

Predictor Coef SE Coef T P

Constant 296.6 162.4 1.83 0.105

Miles 0.006357 0.003121 2.04 0.076

S = 279.775 R-Sq = 34.1% R-Sq(adj) = 25.9%

Analysis of Variance

Source DF SS MS F P

Regression 1 324727 324727 4.15 0.076

Residual Error 8 626192 78274

Total 9 950919

What is a 98% confidence interval for the mean annual repair cost of all used vehicles with 22,500 miles.=> (Given: S_xx= 8,036,677,024 and$\style{font-family:Times New Roman;}{\overline x}$= $43,627.700.)

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$(120.00, 759.20)

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$(–431.51, 1,310.72)

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$(22,199.25, 22,800.75)

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$(128.29, 750.91)

Mynameisrandom · **Reply #1 on:** Feb 26, 2023

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