SOLUTION: We have conducted a weight loss intervention using 40 volunteers and have measured waist circumference before the intervention and after the intervention. Which type of analysis is

Question 1127358: We have conducted a weight loss intervention using 40 volunteers and have measured waist circumference before the intervention and after the intervention. Which type of analysis is more appropriate?
A. Independent samples z-test
B. Independent samples t-test
C. Matched samples t-test
D. Matched samples z-test
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

The paired sample t-test, sometimes called the dependent sample t-test, is a statistical procedure used to determine whether the mean difference between two sets of observations is zero. In a paired sample t-test, each subject or entity is measured twice, resulting in pairs of observations. Common applications of the paired sample t-test include case-control studies or repeated-measures designs. Suppose you are interested in evaluating the effectiveness of a company training program. One approach you might consider would be to measure the performance of a sample of employees before and after completing the program, and analyze the differences using a paired sample t-test.

answer: C. Matched samples t-test
RELATED QUESTIONS
A survey was conducted to study the effects of weight loss from a low fat diet. Two... (answered by stanbon)

A study was conducted to determine weight loss, body composition, etc. in obese women... (answered by Boreal)

Cumulative distributions and ogives Weight Away, a company that sells weight-loss (answered by stanbon)

I am making a round fairy princess skirt for my granddaughter. I have a solid circle cut... (answered by psbhowmick)

A clinical test on humans of a new drug is normally done in three phases. Phase I is... (answered by Solver92311)

After a 10% weight loss, a person weighed 180 pounds. What was the weight before the... (answered by rfer)

A small pilot study is conducted to investigate the effect of a nutritional supplement on (answered by CPhill)

State the null and alternative null hypothesis: Does cocaine use by pregnant women cause (answered by stanbon)

Ideal waist size: For a woman with 40 inch hips the ideal waist is 32 inches. What is (answered by nerdybill)