Test Hypotheses About a Population Proportion
-A Survey Claims That $90 \%$

question 95

Multiple Choice

Test Hypotheses about a Population Proportion
-A survey claims that 9 out of 10 doctors (i.e., $90 \%$ ) recommend brand $Z$ for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand $Z$ is less than $90 \%$ , a random sample of 100 doctors results in 85 who indicate that they recommend brand $Z$ . The test statistic in this problem is approximately:

• A) \(- 1.67\)
• B) \(1.67\)
• C) \(- 1.17\)
• D) \(- 1.33\)

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Definitions:

Specialization

A focus on a particular area of study or work, allowing individuals or entities to become experts in a specific field.

Complexity

Describes a situation, system, or problem that has multiple parts which interact in varied and intricate ways.

Measurable Benefits

Tangible advantages or improvements that can be quantified or assessed directly, often related to business outcomes.

Feedback

The information given to individuals or groups about their performance or behavior with the aim of improving future outcomes.