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3 years ago

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According to the Centers for Disease Control and Prevention, the proportion of U.S. adults age 25 or older who smoke is 0.22. A

researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. She took a random sample of 275 U.S. adults 25 or older who have a bachelor's degree, and the proportion of smokers in her sample is 0.18. What is the null hypothesis in this case? What is the alternative hypothesis in this case?

1 answer:

Dmitrij [34]3 years ago

3 0

Answer: Null hypothesis : $H_0:\ p=0.22$

Alternative hypothesis : $H_a:\ p$

Step-by-step explanation:

Given claim : The proportion of U.S. adults age 25 or older who smoke : $p=0.22$

A researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. i.e. $p$

Since the null hypothesis is a fact checked by the researcher or the experimenter that always contains a equals to sign.

∴ Null hypothesis : $H_0:\ p=0.22$

Alternative hypothesis : $H_a:\ p$

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