Question

A university bookstore claims that 40% of its customers are satisfied with the service and prices. If this claim is true, what is the probability that in a random sample of 500 customers less than 37% are satisfied?

Answer #1

A university bookstore claims that 40% of its customers are
satisfied with the service and prices. If this claim is true, what
is the probability that in a random sample of 500 customers less
than 37% are satisfied?

A hotel claims that 90% of its customers are very satisfied
with its service. Complete parts a through d below based on a
random sample of eight customers.
a. What is the probability that exactly seven customers are
very satisfied?
b. What is the probability that more than seven customers are
very satisfied?
c. What is the probability that less than six customers are
very satisfied?
d. Suppose that of eight customers selected,two responded that
they are very satisfied. What...

A hotel claims that 85 % of its customers are very satisfied
with its service. Complete parts a through d below based on a
random sample of five customers.
a. What is the probability that exactly four customers are very
satisfied? _______ (Round to four decimal places as needed.)
b. What is the probability that more than four customers are
very satisfied? ______ (Round to four decimal places as
needed.)
c. What is the probability that less than three customers...

A hotel claims that 85 % of its customers are very satisfied
with its service. Complete parts a through d below based on a
random sample of eight customers.(Round to four decimal places as
needed.)
a. What is the probability that exactly seven
customers are very satisfied?
b. What is the probability that more than seven
customers are very satisfied?
c. What is the probability that less than six
customers are very satisfied?
d. Suppose that of eight customers selected,...

Please use excel
A restaurant claims that 95% of its customer are very satisfied
with its food.Complete parts a through d below based on a random
sample of 12 customers
a) what is the probability that exactly 5 customers are very
satisfied?
b)what is the probability that more than 7 customers are very
satisfied?
c)what is the probability that less than 9 customers are very
satisfied?
d)what is the probability that at least 3 customers are very
satisfied ?

The CEO of a large electric company claims that 80 % of his
1,000,000 customers are very satisfied with the service they
receive. To test this claim, the local newspaper surveyed a random
sample of 500 customers. Among the sampled customers, only 380 said
they are very satisfied. Is this evidence that the CEOs. claim is
false, and less than 80% of customers are very satisfied? Suppose
that, in fact, 77% of customers are satisfied. Using a significance
level of...

A bookstore claims that 60% of its visitors are return
customers. You sample 200 random customers entering the store and
find that 130 of them had previously visited and bought items from
the bookstore. Estimate the proportion of return customers entering
the store at the 95% confidence level.

A consumer advocate claims that 65 percent of cable television
subscribers are not satisfied with their cable service. In an
attempt to justify this claim, a randomly selected sample of cable
subscribers will be polled on this issue.
Round 'p =' answers to two decimal places.
Round all other probabilities to four decimal places.
(a) Suppose that the advocate's claim is true,
and suppose that a random sample of 7 cable subscribers is
selected. Calculate the probability that 6 or...

At a certain university, three bookstores—the University
Bookstore, the Campus Bookstore, and the Book Mart—currently serve
the university community. From a survey conducted at the beginning
of the fall quarter, it was found that the University Bookstore and
the Campus Bookstore each had 30% of the market, whereas the Book
Mart had 40% of the market. Each quarter, the University Bookstore
retains 80% of its customers but loses 10% to the Campus Bookstore
and 10% to the Book Mart. The...

A telephone service representative believes that the proportion
of customers completely satisfied with their local telephone
service is different between the Midwest and the West. The
representative's belief is based on the results of a survey. The
survey included a random sample of 940 midwestern residents and
1000 western residents. 47% of the midwestern residents and 37% of
the western residents reported that they were completely satisfied
with their local telephone service. Find the 99% confidence
interval for the difference...

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