January 31, 2015

Homework Help: statistics

Posted by iyra on Tuesday, February 9, 2010 at 8:39pm.

The manager of a service station is in the process of analyzing the number of times car owners change the oil in their cars. She believes that the average motorist changes his or her car's oil less frequently than recommended by the owner's manual (two times per year). In a preliminary survey she asked 15 cars owners how many times they changed their car's oil in the last 12 months. The results are listed below.
1 1 2 0 3
3 0 1 0 1
2 3 1 3 1

The value of the test statistic in this problem is approximately equal to_____?

What would be your decision if a hypothesis test was conducted on this problem with the null hypothesis given as H0 : ≥ 2 and the alternate hypothesis given as H1 < 2 ?

1) Reject H0 at the 10%, 5% and 1% level of significance.

2) Reject H0 at the 10% and 5% level of significance but do not reject H0 at the 1% level of significance.

3) Reject H0 at the 10% level of significance but do not reject H0 at the 5% or 1% level of significance.

4) Do not reject H0 at either the 10%, 5% or 1% level of significance

Answer this Question

First Name:
School Subject:

Related Questions

Statistics - A gas station manager thinks the average motorist changes their oil...
math - automoniles arrive at the drive-through windom at a post office at the ...
math - customers arrive at a 3 gas station at an exponential rate 20 cars per ...
statistics - Fast Auto Service provides oil and lube service for cars. It is ...
statistics - An engineering company believes it has developed a faster way to ...
statistics - the manufacturing of jstcare automobile uses a random sample of 500...
algebra - At an auto show, a car dealer asked the first 10 visitors their ages ...
Statistics - A sign on the gas pump of a certain chain of gasoline stations ...
math - number of cars by make owned by 100 one-car owners
algebra - trying to solve a point a slope word problem. you are scheduled to ...