Instruction 10-13 to Investigate the Efficacy of a Diet,a Random Sample of Sample

question 67

Short Answer

Instruction 10-13
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 10-13,what is the 99% confidence interval estimate for the mean difference in weight before and after the diet?

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Definitions:

Psychological Disorders

Mental disorders characterized by patterns of behavior or thought that are both distressing and deviate from societal norms.

Normal

A term used to describe what is typical, expected, or in accordance with norms within a particular context or group.

Disordered

In psychology and medicine, pertaining to a disruption of normal physical or mental functions; often referring to conditions of mental or physical illness.

Psychiatric Disorders

Psychological disorders that involve changes in cognition, emotional state, or behaviour patterns, leading to discomfort or difficulty in daily life.