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

question 157

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, what is the 99% confidence interval estimate for the mean difference in weight before and after the diet?

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Definitions:

Perceived Ineffectiveness

The belief or feeling that one's actions are not producing the intended or desired results.

Underlying Mental Health Conditions

Mental disorders or psychological distress that are present but not immediately noticeable, potentially influencing physical health and quality of life.

Investigate

The process of carrying out research or inquiry to gather facts and information.