Question

last year the mean amount spent by customers at a local sandwich shop was $18.50. The shop owner believes that the mean may be higher this year. state the appropriate null and alternate hypotheses.

Answer #1

The mean amount spent by customers at a local sandwich shop last year was : $18.50

The shop owner believes that the mean may be higher this year or more than $18.50

Null hypothesis:

The mean amount spent by customers at a local sandwich shop last year was equal to $18.50

Alternate hypothesis:

The mean amount spent by customers at a local sandwich shop this year is more than $18.50

A wine bar owner wants to test if the mean amount of money spent
by customers at his store is less than $50 with a standard
deviation of $2. Determine if there is enough evidence to make this
claim at the 0.01 significance level, if a sample of 25 people
produce a mean of $45.

Kmart store chain is interested in estimating the mean amount
its credit card customers spent on their first visit to the chain's
new store in Mandurah. Fifteen credit card accounts were randomly
sampled and analyzed with the following results: top enclose x =
$50.50 and S = 20. Assuming the distribution of the amount spent on
their first visit is approximately normal, construct a 95%
confidence interval for the mean amount its credit card customers
spent on their first visit...

A local grocery store manager was tracking the amount of water
customers purchased during the current pandemic. The store manager
had read an article that stated the mean amount of water purchased
by Americans was 5.7 gallons, but the store manager claims that
customers at the store purchase more than 5.7 gallons of water. To
test this claim, the store manager identified a sample of 25
customers and found that the mean amount of water purchased by the
sample was...

An owner of a candy shop would like to know which of their
products her customers prefer over others. The owner conducts a
customer preference survey based on a sample of 1150 customers. The
results are given in the table below. Conduct the appropriate
hypothesis test using an alpha level of .01.
Chocolate Covered Cherries 320
Gummy Ropes 265
Jawbreakers 285
Sugar-Free Gum 280
4A. Set up the criteria for making the decision. That is, find
the critical value.
4B....

A major store is interested in estimating the mean amount its
credit card customers spent on their first visit to the chain's new
store. Fifteen credit card accounts (n=15) were
randomly sampled and analyzed with the following results: X-bar =
50.5 and S = 20.
Construct a 95% confidence interval for the
mean amount its credit card customers spent on their first visit to
the chain's new store.
Interpret the results (the interval) you got.

The owner of a local grocery chain claims that the true mean
checkout time for customers is less than 12 minutes. In order to
test her claim she took a random sample of 64 customers and
obtained the sample mean checkout time of 11.4 minutes with a
standard deviation of 2.4 minutes. Find the P-Value if we are
testing the pair of hypotheses H0 : µ = 12 Ha : µ < 12
0.1587
0.5
0.0228
0.1915

A magazine claims that the mean amount spent by a customer at
Burger Stop is greater than the mean amount spent by a customer at
Fry World. The results for samples of customer transactions for the
two fast food restaurants are shown below. At
alphaαequals=0.05
can you support the magazine's claim? Assume the population
variances are equal. Assume the samples are random and
independent, and the populations are normally distributed. Complete
parts (a) through (e) below.
Burger Stop
Fry World...

The population mean amount spent per
child on back-to-school clothes last fall was $427 with a
population standard deviation of $160. Assume amounts spent were
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What is the probability that the amount spent on a child is
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0.3944
0.4142
0.4591
0.5788
0.6517

Last year the records of Dairy Land Inc., a convenience
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σ, is known and equal to $12. At the 0.05
significance level, can we conclude that the mean amount spent is
not equal to $30?
Follow the five step hypothesis testing
procedure.

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Henry for one year at 8 percent interest.
Required
a. What is Benz’s interest income for Year
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b. What is Benz’s total amount of receivables at
December 31, Year 1?
c. How will the loan and interest be reported on
Benz’s Year 1 statement of cash flows?
d. What is Benz’s interest income for Year
2?
e. What is the total amount of cash that Benz’s
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