The owner of a service station wants to determine if owners of new cars (two years old or less) change their cars' oil more frequently than owners of older cars (more than two years old). From his records he takes a random sample of ten new cars and ten older cars and determines the number of times the oil was changed in the last 12 months. The data follow. Do these data allow the service station owner to infer at the 10% significance level that new car owners change their cars' oil more frequently than older car owners? Assume Equal variance case. Frequency of Oil Changes in Past 12 Months New Car Owners Old Cars Owners 6 4 3 2 3 1 3 2 4 3 3 2 2 5 3 5 2 4 1

The owner of a service station wants to determine if owners of new cars (two years old or less) change their cars' oil more frequently than owners of older cars (more than two years old). From his records he takes a random sample of ten new cars and ten older cars and determines the number of times the oil was changed in the last 12 months. The data follow. Do these data allow the service station owner to infer at the 10% significance level that new car owners change their cars' oil more frequently than older car owners? Assume Equal variance case. Frequency of Oil Changes in Past 12 Months New Car Owners Old Cars Owners 6 4 3 2 3 1 3 2 4 3 3 2 2 5 3 5 2 4 1

Name: The owner of a service station wants to determine if owners of new ca
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Description: The owner of a service station wants to determine if owners of new cars (two yearsold or less) change their cars' oil more frequently than owners of older cars (morethan two years old). From his records he takes a random sample of ten new carsand te

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

Topic Video

Question

The owner of a service station wants to determine if owners of new cars (two years
old or less) change their cars' oil more frequently than owners of older cars (more
than two years old). From his records he takes a random sample of ten new cars
and ten older cars and determines the number of times the oil was changed in the
last 12 months. The data follow. Do these data allow the service station owner to
infer at the 10% significance level that new car owners change their cars' oil more
frequently than older car owners? Assume Equal variance case.
Frequency of Oil Changes in Past 12 Months
Old Cars Owners
New Car Owners
6.
4
3
2
3
1
3
2
4
3
3
2
6.
2
5
3
5
2
4
1

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