University of California Los Angeles Statistics Questions Paper

All the questions on this homework refer to the following table. This table is based on data from a large sample. For the purposes of this homework, you can treat the n for every fish species as 100.

Question 1

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What is the 95% confidence interval’s margin of error among Bluehead Suckerfish (electrofishing only numers)? Please provide an answer out to three digits.

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Question 2

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What is the 95% confidence interval’s margin of error among Flannelmouth Suckerfish (electrofishing only numers)? Please provide an answer out to three digits.

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Which margin of error is bigger relative to the respective mean? The one for Bluehead Suckerfish or the one for Flannelmouth Suckerfish?

Select one:

a. They are the same

b. Bluehead

c. Flannelmouth

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Which coefficient of variation is bigger? The one for Bluehead Suckerfish or the one for Flannelmouth Suckerfish?

Select one:

a. Bluehead

b. Flannelmouth

c. They are the same

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Describe how the coefficient of variation relates to the margin of error.