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

question 36

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,the critical value for a one-tailed test of the null hypothesis of no difference at the $\alpha$ = 0.05 level of significance is __________.

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Definitions:

Backward Pairing

A conditioning procedure where the conditioned stimulus is presented after the unconditioned stimulus, often leading to weaker learning.

Simultaneous Pairing

A learning method where two stimuli are presented at the same time to create an association between them.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response.

Spontaneous Recovery

The reappearance of a previously extinguished response after a period of no exposure to the conditioned stimulus.