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

question 97

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, there are _______degrees of freedom for this test.

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Definitions:

Calorie Diet

A way of managing food intake by counting and controlling the number of calories consumed, often used for weight management or nutritional purposes.

Smoking

The inhalation of smoke from burning tobacco products, which is a major health risk factor for various diseases, including lung cancer and heart disease.

Pillows

Soft supports used for comfort, decoration, or support in various settings, including medical facilities to aid in patient comfort and positioning.

Tracheostomy Tube

A tube inserted through a surgical opening in the neck into the trachea to maintain an airway and facilitate breathing.