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

question 80

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 90% confidence interval estimate for the mean difference in weight before and after the diet?

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Definitions:

Laffer Curve

A theory that illustrates the relationship between tax rates and the amount of tax revenue collected by governments.

Deadweight Loss

A loss of economic efficiency that can occur when equilibrium for a good or service is not achieved or is unattainable.

Tax Per Unit

A tax that is levied on a per unit basis, meaning for every unit of a good produced or sold, a certain amount of tax is paid.

Deadweight Loss

A reduction in economic effectiveness that happens when a good or service does not reach, or cannot reach, its equilibrium state.