Question

A Manufacturer claims that the average weight of a bar of chocolate is 3.53 ounces. We take a random sample of 18 chocolate bars, and the sample has an average weight of 3.5 ounces, with a standard deviation of .4 ounces. Is there sufficient evidence to claim that the manufacturer is cheating on the weight?

Answer #1

A famous food manufacturer claims that the mean weight of their
chocolate bars is 2.66 ounces with standard deviation 0.45 ounces.
A consumer watchdog group sampled 150 chocolate bars from this
company. The mean weight is 2.29 ounces. Set up a hypothesis test
at the significance level 0.10 Part 1: what is the H1 statement?
Part 2: what is the claim? Part 3: what is the p-value? Select one:
a. Part 1 H1 μ < 2.66 Part 2 H1 is...

The distribution of actual weights of 8-oz chocolate bars
produced by a certain machine is normal with mean 8.3 ounces and
standard deviation 0.19 ounces.
(a) What is the probability that the average weight of a bar in
a Simple Random Sample (SRS) with four of these chocolate bars is
between 8.2 and 8.49 ounces?
ANSWER:
(b) For a SRS of four of these chocolate bars, what is the level
LL such that there is a 5% chance that the...

A manufacturer claims that the mean weight of flour in its
32-ounce bags is 32.1 ounces. A T-Test is performed to determine
whether the mean weight is actually less than this. The mean weight
for a random sample of 45 bags of flour was 30.7 ounces with a
standard deviation of 2.5 ounces. Test the claim at the 5%
significance level.
a) Check the assumptions:
b) Hypotheses (State in symbols and in words):
Ho:
Ha:
c) Test Statistic: d) Sketch:...

1 point) The
distribution of actual weights of 8-oz chocolate bars produced by a
certain machine is normal with mean 8.2 ounces and standard
deviation 0.12 ounces.
(a) What is the probability that the average weight of a bar in
a Simple Random Sample (SRS) with three of these chocolate bars is
between 8.06 and 8.34 ounces?
ANSWER:
(b) For a SRS of three of these chocolate bars, what is the
level LL such that there is a 2% chance...

The
average number of calories in a 1.5 ounce chocolate bar is 225.3
with standard deviation of 9.8 calories. The distribution of
calories are approximately normal. Select 14 chocolate bars at
random, What is the probability that a random sample of 14
chocolate bars will result in a sample mean less than 240
calories?

(2 pts) The distribution of actual weights of 8-oz chocolate
bars produced by a certain machine is normal with mean 7.8 ounces
and standard deviation 0.2 ounces.
(a) What is the probability that the average weight of a random
sample of 4 of these chocolate bars will be between 7.66 and 7.9
ounces?
ANSWER:
(b) For a random sample of of these chocolate bars, find the
value L such that P(x¯<L)= 0.0281.
ANSWER:

A manufacturer claims that the mean weight of flour in its
32-ounce bags is its 32.1 ounces. A T-Test is performed to
determine whether the mean weight is actually less than this. The
mean weight for a random sample of 45 bags of flour was 30.7 ounces
with a standard deviation of 2.5 ounces. Test the claim at the 5%
significance level.
a) Check the assumptions:
b) Hypotheses (State in symbols and in words): Ho: Ha:
c) Test Statistic: ___________________...

A brand of chocolate bar has a stated weight of 6 oz. with s=
0.25 oz. A sample of 9 bars has an average weight of 6.05 oz.
Test H0: µ = 6 oz. H1: µ ≠ 6 oz. at the 5%
significance level.

Use the traditional method to test the given hypothesis. A
manufacturer uses a new production method to produce steel rods. A
random sample of 17 steel rods resulted in lengths with a standard
deviation of 2.3 cm. At the 0.10 significance level, test the claim
that the new production method has lengths with a standard
deviation different from 3.5 cm, which was the standard deviation
for the old method.
answer options:
There is not sufficient evidence to warrant rejection of...

Suppose a chef claims that her meatball weight is less than 4
ounces, on average. Several of her customers do not believe her, so
the chef decides to do a hypothesis test, at a 10% significance
level, to persuade them. She cooks 14 meatballs. The mean weight of
the sample meatballs is 3.7 ounces. The chef knows from experience
that the standard deviation for her meatball weight is 0.5 ounces.
H0: μ≥4; Ha: μ<4 α=0.1 (significance level) What is the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 53 seconds ago

asked 7 minutes ago

asked 7 minutes ago

asked 13 minutes ago

asked 15 minutes ago

asked 18 minutes ago

asked 20 minutes ago

asked 24 minutes ago

asked 24 minutes ago

asked 34 minutes ago

asked 37 minutes ago

asked 37 minutes ago