A Test of Sobriety Involves Measuring the Subject's Motor Skills

question 83

Multiple Choice

A test of sobriety involves measuring the subject's motor skills.Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.4.At a significance level of 0.01,test the claim that the true mean score for all sober subjects is equal to 39.0.

• A)Reject the null hypothesis of μ = 39.0 with a P-value of 0.00823.There is strong evidence that the true mean score for sober subjects is not 39.0.
• B)Reject the null hypothesis of μ = 39.0 with a P-value of 0.01647.There is sufficient evidence that the true mean score for sober subjects is different from 39.0.
• C)Fail to reject the null hypothesis of μ = 39.0 with a P-value of 0.01647.There is not sufficient evidence that the true mean score for sober subjects is different from 39.0.
• D)Fail to reject the null hypothesis of μ = 39.0 with a P-value of 0.02647.There is not sufficient evidence that the true mean score for sober subjects is different from 39.0.
• E)There is not enough information to perform the test.

---

Definitions:

Primary Research

Collection of original data through firsthand investigation, such as surveys, interviews, or experiments.

Experiments

Systematic procedures carried out to test hypotheses, observe effects, and study relationships between variables.

Secondary Research

The process of gathering existing data from previously conducted studies and analyses, which are available in books, articles, and online resources.

Ethnographic Research

A qualitative research method focusing on the systematic study of cultures and peoples through observation and participatory involvement.