Test Hypotheses About a Population Proportion
-Increasing Numbers of Businesses $85 \%$

question 146

Essay

Test Hypotheses about a Population Proportion
-Increasing numbers of businesses are offering child-care benefits for their workers. However, one union claims that more than $85 \%$ of firms in the manufacturing sector still do not offer any child-care benefits to their workers. A random sample of 330 manufacturing firms is selected, and only 28 of them offer child-care benefits. Specify the rejection region that the union will use when testing at $\alpha = 0.10$ .

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Definitions:

Reproductive Isolating

Biological barriers that prevent different species from mating and producing fertile offspring, maintaining species boundaries.

Sociobiology

The scientific study of the biological aspects of social behavior in animals and humans.

E. O. Wilson

An influential American biologist who was a leading researcher in sociobiology, biodiversity, and the importance of ants and other small creatures in ecosystems.

N. Tinbergen

Nikolaas Tinbergen was a Dutch biologist and ornithologist who won the Nobel Prize in Physiology or Medicine for his discoveries concerning social behavior patterns in animals.