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:

Semicircular Canals

Three looped tubes in the inner ear that are filled with fluid and help with maintaining balance by detecting head rotation.

Action Potentials

Brief electrical impulses that serve as the fundamental signals by which information is transmitted along nerve cells.

Endolymph

A fluid contained in the inner ear, playing a critical role in translating the movements of the head into neural signals for the brain to interpret balance and spatial orientation.

Hair Cells

Sensory cells located in the inner ear that are critical for hearing and balance, converting mechanical sound waves into neural signals.