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Making Inferences from Multiple Samples

Solve each problem.

1 A biologist is studying diseases in chimpanzees. He takes three random samples of the same size

from a troop of 150 chimpanzees. One sample indicates that 3% of the chimpanzees are hairless,

another sample indicates that 5% are hairless, and a third sample indicates that 4% are hairless.

How many hairless chimpanzees should the biologist expect to find in the troop?

Respuesta :

Using proportions, it is found that the biologist should be expected to find 6 hairless chimpanzees in the troop.

What is a proportion?

A proportion is a fraction of a total amount.

In this problem, the mean of each sample is as follows: 3%, 5% and 4%.

Hence, from all samples, the mean should be expected to be of:

(3% + 5% + 4%)/3 = 4%.

Out of 150 chimpanzees:

0.04 x 150 = 6.

The biologist should be expected to find 6 hairless chimpanzees in the troop.

More can be learned about proportions at https://brainly.com/question/24372153

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