One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will
Posted: Wed May 11, 2022 7:06 am
One cable company claims that it has excellent customer service.
In fact, the company advertises that a technician will arrive
within 30 minutes after a service call is placed. One
frustrated customer believes this is not accurate, claiming that it
takes over 30 minutes for the cable technician to arrive. The
customer asks a simple random sample of 16 other cable
customers how long it has taken for the cable technician to arrive
when they have called for one. The sample mean for this group is
31.7 minutes with a standard deviation of 8.9 minutes. Assume
that the population distribution is approximately normal. Test the
customer’s claim at the 0.10 level of significance.
Step 1 of 3: State the null and alternative hypotheses for the
test. Fill in the blank below. H0: μ=30
Ha: μ⎯⎯30
Step 2 of 3:
Compute the value of the test statistic. Round your answer to
three decimal places.
Step 3 of 3:
Draw a conclusion and interpret the decision.
In fact, the company advertises that a technician will arrive
within 30 minutes after a service call is placed. One
frustrated customer believes this is not accurate, claiming that it
takes over 30 minutes for the cable technician to arrive. The
customer asks a simple random sample of 16 other cable
customers how long it has taken for the cable technician to arrive
when they have called for one. The sample mean for this group is
31.7 minutes with a standard deviation of 8.9 minutes. Assume
that the population distribution is approximately normal. Test the
customer’s claim at the 0.10 level of significance.
Step 1 of 3: State the null and alternative hypotheses for the
test. Fill in the blank below. H0: μ=30
Ha: μ⎯⎯30
Step 2 of 3:
Compute the value of the test statistic. Round your answer to
three decimal places.
Step 3 of 3:
Draw a conclusion and interpret the decision.