+
A CAR MANUFACTURER CLAIMS THAT ITS VEHICLES AVERAGE AT LEAST 30 MILES

A CAR MANUFACTURER CLAIMS THAT ITS VEHICLES AVERAGE AT LEAST 30 MILES

Rating:
Rating
(0)
Author: Christine Farr
Description:

http://theperfecthomework.com/a-car-manufacturer-claims-that-its-vehicles-average-at-least-30-miles-per-gallon-with-apopulation-variance-of-4/

A car manufacturer claims that its vehicles average at least 30 miles per gallon., with apopulation variance of 4. We take a sample of 8 cars to test fuel efficiency, and wish to perform ahypothesis test on the car manufacturers claim at a level of α=.975.22.
The critical value for the sample mean X , below which we will reject the null hypothesis of 30miles per gallon, is
:a. 27.5
b. 28.6
c. 29.1
d. 29.5
e. 30.023.
 
Suppose the answer to #22 is 29 (it isn’t, but assume it is for the following). Also, suppose thetrue population mean for fuel efficiency is 27.5 miles per gallon. Then, the Power of thishypothesis test is:
a. .0170
b. .0523
c. .5423
d. .7801
e. .9830


(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial