Test Hypotheses About a Population Mean with Known Using Confidence $\$ 192$

question 90

Short Answer

Test Hypotheses about a Population Mean with Known Using Confidence Intervals
-A group of 40 homeowners showed that their average monthly gasoline bill was $\$ 192$ with a standard deviation of $\$ 8$ . According to a national consumer group, their mean bill should be $\mu = \$ 188$ . Test this hypothesis by constructing a $95 \%$ confidence interval for the population mean.

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Definitions:

Free Speech

Free speech is the right to express opinions without censorship or restraint by the government, subject to limitations to prevent harm or illegal activities.

Discriminated

Treated someone unfairly or differently because of characteristics like race, age, gender, etc., often resulting in a negative impact on the person discriminated against.

Free and Democratic Society

A society characterized by the protection of individual rights, the rule of law, and governance through the free and fair election of representatives.

Aboriginal People

Indigenous groups that are the original inhabitants of a given region, with unique cultures, languages, and traditions.