One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will
Posted: Wed May 11, 2022 4:38 pm
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 4 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 32.8 minutes with a standard
deviation of 8.8 minutes. Assume that the population distribution
is approximately normal. Test the customer’s claim at the 0.01
level of significance.
Step 1 of 3: State the null and alternative hypotheses for the
test. Fill in the blank below.
H0Ha: μ=30: 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 4 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 32.8 minutes with a standard
deviation of 8.8 minutes. Assume that the population distribution
is approximately normal. Test the customer’s claim at the 0.01
level of significance.
Step 1 of 3: State the null and alternative hypotheses for the
test. Fill in the blank below.
H0Ha: μ=30: 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.