TABLE 10-7 to Investigate the Efficacy of a Diet, a Random

question 17

Short Answer

TABLE 10-7
To investigate the efficacy of a diet, a random sample of 16 male patients is drawn from a population of adult males using the diet. The weight of each individual in the sample is taken at the start of the diet and at a medical follow-up 4 weeks later. Assuming that the population of differences in weight before versus after the diet follow a normal distribution, the t-test for related samples can be used to determine if there was a significant decrease in the mean weight during this period. Suppose the mean decrease in weights over all 16 subjects in the study is 3.0 pounds with the standard deviation of differences computed as 6.0 pounds.
-Referring to Table 10-7, the critical value for a one-tailed test of the null hypothesis of no difference at the ? = 0.05 level of significance is______ .

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Definitions:

Economic Motivation

The driving factors behind decisions made by individuals or organizations that are primarily concerned with financial gain or the optimal allocation of resources.

Interstate Commerce Commission

The first federal agency monitoring business operations, established in 1887 to regulate the railroad industry and later expanded to oversee other modes of transportation and commerce.

Railroad Rate-making

The process by which railroad companies set freight and passenger rates, historically a significant regulatory and economic issue in the United States.

Pendleton Civil Service Act

A federal law enacted in 1883 that established the principle of federal employment on the basis of merit and created a civil service commission.