Question

It is claimed that automobiles are driven on average more than 21,000 kilometers per year. To test this claim, 100 randomly selected automobile owners are asked to keep a record of the kilometers they travel. Would you agree with this claim if the random sample showed an average of 21,350 kilometers and a standard deviation of 3700 kilometers? Use a P-value in your conclusion. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. Identify the null and alternative hypotheses. O A. Ho: u = 21,000 H <21,000 OD. Hou = 21,000 H> 21,000 OB. Hou > 21,000 H: = 21,000 O E. Ho u<21,000 H = 21,000 0 C. HỌ: 21,000 H: = 21,000 0F Ho: H= 21,000 Hu# 21,000 Find the test statistic. (Round to two decimal places as needed.) Determine the range into which the P-value falls. What is the appropriate conclusion for this test? Ho and conclude that there sufficient evidence to agree with the claim that automobiles are driven on average more than 21,000 kilometers per year. In general, H, would be rejected for significance levels than the P-value

Answer 1

0 D. Ho: H= 21,000 Hu> 21,000

population mean μ=	21000
sample mean 'x̄=	21350.000
sample size    n=	100.00
std deviation s=	3700.000
std error ='sx=s/√n=	370.0000
test stat t ='(x-μ)*√n/sx=	0.95

0.15 SP-value <0.20

fail to reject Ho , and conclude that there is not sufficient evidence,,,,,,,greater than