An online retailer claims the proportion of on-time deliveries is 85%. To test this claim, a...
An online retailer claims the proportion of on-time deliveries is 85%. To test this claim, a random sample of deliveries are monitored and checked for on-time delivery status.
Assume that the test statistic for this hypothesis test is 1.99.
Since this is a two tailed hypothesis test, assume that the critical values for this hypothesis test are −1.96 and 1.96.
Come to a decision for the hypothesis test and interpret your results with respect to the original claim.
Select the correct answer below:
Reject the null hypothesis.
There is enough evidence to reject the claim that the proportion of
on-time deliveries is 85%.
or
Fail to reject the null hypothesis.
There is not enough evidence to reject the claim that the
proportion of on-time deliveries is 85%.
Homework Answers
since test statistic falls in region region:
Reject the null hypothesis.
There is enough evidence to reject the claim that the proportion of on-time deliveries is 85%.
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Test the claim that the proportion of people who own cats is
larger than 20% at the 0.005 significance level.
The null and alternative hypothesis would be:
H0:μ≤0.2H0:μ≤0.2
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H0:μ≥0.2H0:μ≥0.2
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The test is:
left-tailed
two-tailed
right-tailed
Based on a sample of 100 people, 26% owned cats
The p-value is: (to 2 decimals)
Based on this we:
Fail to reject the null hypothesis
Reject the null hypothesis
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