THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 58

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
To investigate the effectiveness of a diet,a random sample of 16 female patients is drawn from a population of adult females using the diet.The weight of each individual in the sample is taken at the start and at the end of the diet.Assume that the population of differences in weight before and after the diet follows a normal distribution.Suppose the mean decrease in weights over all 16 subjects in the study is 4.0 pounds with the standard deviation of differences computed as 6.4 pounds.Let µ_x - µ_y = mean weight before the diet - mean weight after the diet.
-In order to test if the diet is effective,what is the appropriate alternative hypothesis?

• A)H₁ : μ_d < 0
• B)H₁ : μ_d > 0
• C)H₁ : μ_d = 0
• D)H₁ : μ_d ≠ 0

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Definitions:

Russell's Traction

A form of skeletal traction for treating fractures of the femur, involving the use of weights and pulleys to align and stabilize the bone.

Surgical Intervention

The act of performing surgery to treat diseases, injuries, or deformities.

Wet Cast

A cast that has not yet fully hardened or dried, requiring careful handling to maintain its shape and effectiveness in supporting a broken bone.

Indenting the Cast

A dental procedure involving the creation of marks or indentations on a dental cast for various treatment planning purposes.