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

question 2

Short Answer

Instruction 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 kilograms with the standard deviation of differences computed as 6.0 kilograms.
-Referring to Instruction 10-7,there are__________degrees of freedom for this test.

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Definitions:

Myosin Myofilaments

Protein filaments in muscle cells that function with actin filaments to cause muscle contraction through their sliding mechanism.

Actin Myofilaments

Thin filaments in muscle cells that, along with myosin filaments, contribute to muscle contraction.

I Band

Area between the ends of two adjacent myosin myofilaments within a myofibril; Z disk divides the I band into two equal parts.

M Line

Line in the center of the H zone made of delicate filaments that holds the myosin myofilaments in place in the sarcomere of muscle fibers.