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

question 125

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 doctors was taken. Suppose the test statistic is $\mathrm { z } = - 1.95$ . Can we conclude that $\mathrm { H } _ { 0 }$ should be rejected at the a) $\alpha = 0.10$ , b) $\alpha = 0.05$ , and c) $\alpha = 0.01$ level?

• A) a) yes; b) yes; c) no
• B) a) yes; b) yes; c) yes
• C) a) no; b) no; c) no
• D) a) no; b) no; c) yes

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Definitions:

Price

The price one must pay to obtain a specific good or service.

Total Production

The aggregate quantity of goods or services produced by an economy, firm, or industry over a particular period of time.

Bricklayers

Skilled tradespeople who lay bricks, blocks, and other types of building components to construct or repair walls, foundations, and other structures.

Productivity

The efficiency of production, measured as the ratio of output to inputs used in the production process.