Question

**Salmon Weights (Raw Data, Software
Required):**

Assume that the weights of spawning Chinook salmon in the Columbia
river are normally distributed. You randomly catch and weigh 15
such salmon. The data is found in the table below. You want to
construct a 99% confidence interval for the mean weight of all
spawning Chinook salmon in the Columbia River. You will need
software to answer these questions. You should be able to copy the
data directly from the table into your software program.

Salmon | Weight |

1 | 25.7 |

2 | 24.8 |

3 | 36.0 |

4 | 26.6 |

5 | 18.9 |

6 | 22.5 |

7 | 33.2 |

8 | 25.8 |

9 | 23.5 |

10 | 26.8 |

11 | 32.5 |

12 | 27.7 |

13 | 28.8 |

14 | 28.3 |

15 | 31.5 |

(a) What is the point estimate for the mean weight of all spawning Chinook salmon in the Columbia River? Round your answer to
2 decimal places.pounds (b) Construct the 99% confidence interval for the mean weight of all spawning Chinook salmon in the Columbia River. Round
your answers to 2 decimal places.< μ <(c) Are you 99% confident that the mean weight of all spawning Chinook salmon in the Columbia River is greater than 23 pounds and why? No, because 23 is above the lower limit of the confidence interval. Yes, because 23 is below the lower limit of the confidence interval. No, because 23 is below the lower limit of the confidence interval. Yes, because 23 is above the lower limit of the confidence interval. (d) Recognizing the sample size is less than 30, why could we use the above method to find the confidence interval? Because the sample size is greater than 10. Because the parent population is assumed to be normally distributed. Because the sample size is less than 100. Because we do not know the distribution of the parent population. |

Answer #1

Salmon Weights (Raw Data, Software
Required):
Assume that the weights of spawning Chinook salmon in the Columbia
river are normally distributed. You randomly catch and weigh 15
such salmon. The data is found in the table below. You want to
construct a 95% confidence interval for the mean weight of all
spawning Chinook salmon in the Columbia River. You will need
software to answer these questions. You should be able to copy the
data directly from the table into your...

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 28.2 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...

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...

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...

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...

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 4.8 pounds. We 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. You randomly catch and
weigh 20 such salmon. The mean weight from your sample is 25.2
pounds with a standard deviation of 4.5 pounds.
(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: 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. ...

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