Question

**Salmon:** Assume that the weights of spawning
Chinook salmon in the Columbia River are normally distributed with
a population standard deviation (*σ*) of 4.1 pounds. You
randomly catch and weigh 24 such salmon. The mean weight from your
sample is 22.9 pounds. Test the claim that the mean weight of
Columbia River salmon is greater than 22 pounds. Use a 0.10
significance level.

(a) What type of test is this?

1-This is a left-tailed test.

2-This is a right-tailed test.

3- This is a two-tailed test.

(b) What is the test statistic? **Round your answer to 2
decimal places.**

*z*_{x}=

(c) What is the P-value of the test statistic? **Round your
answer to 4 decimal places.**

P-value =

(d) What is the conclusion regarding the null hypothesis?

(e) Choose the appropriate concluding statement.

1-The data supports the claim that the mean salmon weight in the Columbia River is greater than 22 pounds.

2-There is not enough data to support the claim that the mean salmon weight in the Columbia River is greater than 22 pounds.

3- We reject the claim that the mean salmon weight in the Columbia River is greater than 22 pounds.

4-We have proven that the mean salmon weight in the Columbia River is greater than 22 pounds.

Answer #1

Assume that the weights of spawning Chinook salmon in the
Columbia River are normally distributed with a population standard
deviation (σ) of 3.9 pounds. You randomly catch and weigh
20 such salmon. The mean weight from your sample is 24.9 pounds.
Test the claim that the mean weight of Columbia River salmon is
greater than 24 pounds. Use a 0.10significance level.
(a) What type of test is this?
This is a right-tailed test.
This is a left-tailed test.
This is...

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(a) What type of test is this?
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test. ...

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the Columbia River are normally distributed. You randomly catch and
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(a) Test the claim that the mean weight of Columbia River salmon
is greater than 23 pounds. Use a 0.10 significance level.
(b) Test the same claim at the 0.05 significance level.
(c) Test the same claim at the 0.01...

Salmon Weights: Assume that the weights of
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mean weight of all spawning Chinook salmon in the Columbia
River.
(a) What is the point estimate for the mean
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Salmon Weights: Assume that the weights of
spawning Chinook salmon in the Columbia river are normally
distributed. You randomly catch and weigh 26 such salmon. The mean
weight from your sample is 22.2 pounds with a standard deviation of
4.6 pounds. You want to construct a 95% confidence interval for the
mean weight of all spawning Chinook salmon in the Columbia
River.
(a) What is the point estimate for the mean weight of all
spawning Chinook salmon in the Columbia...

Assume that the weights of spawning Chinook salmon in the
Columbia river are normally distributed. You randomly catch and
weigh 19 such salmon. The mean weight from your sample is 19.2
pounds with a standard deviation of 4.7 pounds. You want to
construct a 95% confidence interval for the mean weight of all
spawning Chinook salmon in the Columbia River.
(a) What is the point estimate for the mean weight of all
spawning Chinook salmon in the Columbia River?
pounds...

Assume that the weights of spawning Chinook salmon in the
Columbia river are normally distributed. You randomly catch and
weigh 26 such salmon. The mean weight from your sample is 31.2
pounds with a standard deviation of 4.6 pounds. You want to
construct a 90% confidence interval for the mean weight of all
spawning Chinook salmon in the Columbia River. (a) What is the
point estimate for the mean weight of all spawning Chinook salmon
in the Columbia River? pounds...

Salmon: Assume that the weights of spawning Chinook Salmon in
the Columbia River are normally distributed with a population
standard deviation (σ) of 4.5 pounds. You randomly catch and weigh
20 such salmon. The mean weight from your sample is 25.2 pounds. We
did this problem earlier in this problem set while assuming that
the sample standard deviation was 4.5 pounds. We now assume the
population standard deviation is 4.5 pounds.
(a) Test the claim that the mean weight of...

Salmon Weights: Assume that the weights of spawning Chinook
salmon in the Columbia river are normally distributed. You randomly
catch and weigh 18 such salmon. The mean weight from your sample is
22.2 pounds with a standard deviation of 4.6 pounds. We want to
construct a 99% confidence interval for the mean weight of all
spawning Chinook salmon in the Columbia River.
(a) What is the point estimate for the mean weight of all
spawning Chinook salmon in the Columbia...

Salmon Weights: Assume that the weights of
spawning Chinook salmon in the Columbia river are normally
distributed. You randomly catch and weigh 19 such salmon. The mean
weight from your sample is 19.2 pounds with a standard deviation of
4.2 pounds. We want to construct a 99% confidence interval for the
mean weight of all spawning Chinook salmon in the Columbia
River.
(a) What is the point estimate for the mean weight of all
spawning Chinook salmon in the Columbia...

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