Biology

Biology, 29.10.2019 04:31, Randy11111

Acertain type of hummingbird is known to have an average weight of 4.55 grams. a researcher wonders if hummingbirds (of this same type) living in the grand canyon differ in weight from the population as a whole. the researcher finds a sample of 30 such hummingbirds from the grand canyon and calculates their average weight to be 3.75 grams.

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Mathematics, 21.08.2019 23:30, baeethtsadia

There are 3 ruby throated hummingbirds and two of another type at the feeder. the birds have a mass of 23 grams in all. what other type of hummingbird is at the feeder? explain

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Mathematics, 27.09.2019 21:20, hwang258

Allen's hummingbird (selasphorus sasin) has been studied by zoologist bill alther.† suppose a small group of 10 allen's hummingbirds has been under study in arizona. the average weight for these birds is x = 3.15 grams. based on previous studies, we can assume that the weights of allen's hummingbirds have a normal distribution, with σ = 0.26 gram. (a) find an 80% confidence interval for the average weights of allen's hummingbirds in the study region. what is the margin of error? (round your answers to two decimal places.)

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Mathematics, 05.11.2019 03:31, sheiladenson3619

Allen's hummingbird (selasphorus sasin) has been studied by zoologist bill alther.† suppose a small group of 12 allen's hummingbirds has been under study in arizona. the average weight for these birds is x = 3.15 grams. based on previous studies, we can assume that the weights of allen's hummingbirds have a normal distribution, with σ = 0.22 gram. find an 80% confidence interval for the average weight of allen�s hummingbirds in the study region. what is the margin of error? .109 -1.17 < u < 1.39 (is this correct? ) what conditions are necessary for your calculations? compare your results in the context of this problem. find the sample size necessary for an 80% confidence level with a maximal margin of error e = 0.08 for the mean weight of the hummingbirds. 3.88

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Mathematics, 14.11.2019 19:31, XxXisaiahXxX

Allen's hummingbird (selasphorus sasin) has been studied by zoologist bill alther.† suppose a small group of 19 allen's hummingbirds has been under study in arizona. the average weight for these birds is x = 3.15 grams. based on previous studies, we can assume that the weights of allen's hummingbirds have a normal distribution, with σ = 0.34 gram. find an 80% confidence interval for the average weight of allen�s hummingbirds in the study region. what is the margin of error? .109 -1.17 < u < 1.39 (is this correct? ) what conditions are necessary for your calculations? compare your results in the context of this problem. find the sample size necessary for an 80% confidence level with a maximal margin of error e = 0.08 for the mean weight of the hummingbirds. 3.88 (is this correct? )

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