Ecology: Hummingbirds Bill Alther is a zoologist who
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Ecology: Hummingbirds Bill Alther is a zoologist who studies Annas hummingbird (Calypte anna). (Reference: Hummingbirds, K. Long, W. Alther.) Suppose that in a remote part of the Grand Canyon, a random sample of six of these birds was caught, weighed, and released. The weights (in grams) were 3.7 2.9 3.8 4.2 4.8 3.1 The sample mean is Let x be a random variable representing weights of Annas hummingbirds in this part of the Grand Canyon. We assume that x has a normal distribution and It is known that for the population of all Annas hummingbirds, the mean weight is Do the data indicate that the mean weig
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