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Author Question: Tenused cars from a rental fleet are randomly selected. Each vehicles annual maintenance cost from ... (Read 28 times)

Apple716

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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: Sxx= 8,036,677,024 and\(\style{font-family:Times New Roman;}{\overline x}\)= $43,627.700.)


$(120.00, 759.20)


$(431.51, 1,310.72)


$(22,199.25, 22,800.75)


$(128.29, 750.91)



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Marked as best answer by Apple716 on Feb 26, 2023

Mynameisrandom

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Apple716

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Reply 2 on: Feb 26, 2023
Great answer, keep it coming :)


zacnyjessica

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Reply 3 on: Yesterday
:D TYSM

 

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