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:

Skinner

B.F. Skinner, an influential American psychologist known for his work in behaviorism and the development of the theory of operant conditioning.

Psychosexual Stages

A series of developmental stages proposed by Freud, through which a child's personality develops, each characterized by the focus of libido on a different area of the body.

Freud

Sigmund Freud was an Austrian neurologist who founded psychoanalysis, a method for treating psychopathology through dialogue between a patient and a psychoanalyst.

Adult Personality

The combination of characteristics or qualities that form an individual's distinctive character in adulthood, often considered relatively stable over time.