TABLE 10-6 To Investigate the Efficacy of a Diet, a Random Sample

question 28

Short Answer

TABLE 10-6
To investigate the efficacy of a diet, a random sample of 16 male patients is selected 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 10-6, the t test should be ________ -tail.

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Definitions:

Taste Cells

Specialized epithelial cells within taste buds that detect chemical stimuli and initiate the perception of taste.

Threshold

A level, point, or value above which something is true or will occur and below which it is not or will not.

Lacrimal Glands

Glands located in the upper outer region of the orbits that produce tears for lubrication and protection of the eye.

Oculomotor Nerve

The third cranial nerve responsible for controlling most of the eye's movements, including constriction of the pupil and maintaining an open eyelid.