Question

A fast food chain claims that **the average fat content in
one of their burgers is 270 grams**. A consumer group test
15 samples and finds that the content is 330 grams with a standard
deviation of 45 grams. Test the manufacturer’s claim at

(a) L/S 0.05 HW 11-1

(b) L/S 0.01 HW 11-2

A fast food chain claims that **the average fat content in
one of their burgers is less than 270 grams**. A consumer
group test 15 samples and finds that the content is 330 grams with
a standard deviation of 45 grams. Test the manufacturer’s claim
at

(a) L/S 0.05 HW 11-3

(b) L/S 0.01 HW 11-4

Answer #1

1.A fast-food chain claims that the fat content of one of its
cheeseburgers is 22 grams. A consumer health group wanted to check
this claim, so it obtained a random sample of 20 cheeseburgers from
the chain and measured the fat content. The fat contents (in grams)
are shown below, rounded to the nearest gram.
Use Excel to test whether the mean fat content is different from
22 grams. Identify the p-value from the output, rounding to three
decimal places....

A fast-food chain claims one small order of its tater tots
weighs 90 grams. Ava thinks she is getting less than what the
restaurant advertises. She weighs the next 14 random orders of
tater tots before she eats them and finds the sample mean is 89.3
grams and the standard deviation is 3.71 grams. What conclusion can
be drawn at α = 0.05?
There is not sufficient evidence to prove the fast-food chain
advertisement is true.
There is sufficient evidence...

Your sister, a consumer food advocate, is concerned
about the mean fat content of the burgers you typically eat for
lunch. She purchases 12 burgers from the restaurant and submits it
to an independent laboratory for analysis. The percentage of fat in
each burger is given by the following data:
21 18 19 16 18 24 22 19 24 14 18 15
The owner of the restaurant claims that the mean fat
content of its burgers is no more than...

A fast-food chain claims one large order of its fries weighs 170
grams. Joe thinks he is getting less than what the restaurant
advertises. He weighs the next 12 random orders of fries before he
eats them and finds the sample mean is 165.9 grams and the standard
deviation is 11.98 grams. What conclusion can be drawn at α =
0.10?
There is not sufficient evidence to prove the fast-food chain
advertisement is true.
There is sufficient evidence to prove...

Bobo's bad burgers fast food claims you will be in and out in 5
mins. To test this claim, time in mins from entering Bobo's to
receiving the order was secretly recorded. The results: 2.1 8 4.6
2.5 3.5 4.3 3.9 5 6.5 3.4 5.6 6.6 4.3 4.9 9.3 5.5 4.3 11.9 5.2 4.8
5.2 7.8 8 4.6 4 5.9 8.7 3.1 4.9 11.6 2.1 8 4.6 2.5 3.5 4.3 3.9 5
6.5 3.4 5.6 6.6 4.3 4.9 9.3 5.5...

2. A fast-food chain claims that their “HUGE” size drink
contains 36.3counces on average. A customer wants to test that the
“HUGE” size drink contains less amount of drink. A random sample of
50 “HUGE” size cups is taken. The average weight of the drink from
the sample is 35.8 ounces with a standard deviation of 0.78 ounces.
Conduct the hypothesis test at 10% significance level.

A fast-food chain claims that their “HUGE” size drink contains
36.3counces on average. A customer wants to test that the “HUGE”
size drink contains less amount of drink. A random sample of 50
“HUGE” size cups is taken. The average weight of the drink from the
sample is 35.8 ounces with a standard deviation of 0.78 ounces.
Conduct the hypothesis test at 10% significance level.

Bobo’s bad burgers fast food claims you will be in and out in 5
minutes. To test this claim, time in minutes from entering Bobo’s
to receiving the order was secretly recorded. The results are
documented in DATA. At a 95% confidence level, does the confidence
interval support Bob’s Claim?
Wait Time (minutes) 1.1 6.8 1.9 0.1 0.4 3.1 1.9 2.0 5.1 1.3 3.6
3.6 2.7 1.9 7.5 3.8 2.3 9.2 3.0 3.3 1.8 4.9 6.0 4.1 1.8 5.7 6.7...

The manufacturer of a new cigarette claims that the average tar
content per cigarette is 10.0 mg. The US Center for Smoking Research believes
the tar content percigarette is greater than 10 mg and wishes to conduct a study to
support their claim. Theytake a random sample of 25 cigarettes from the production line and
find an average of 10.20mg of tar/cigarette and a standard deviation of .5 mg. Can the
manufacturer’s claim berefuted at the 0.01 level of significance?A....

The Fast N' Hot food chain wants to test if their "Buy One, Get
One Free" program increases customer traffic enough to support the
cost of the program. For each of 15 stores, one day is selected at
random to record customer traffic with the program in effect, and
one day is selected at random to record customer traffic with
program not in effect. The results of the experiment are documented
in DATA. For each store, compute difference = traffic...

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