Research Scenario: You have a group of 25 people who have high cholesterol and d

Question

Research Scenario: You have a group of 25 people who have high cholesterol and do not do any form of exercise. You want to know if a person’s cholesterol statistically significantly decreases after running for 30 minutes four times per week. You implement a 3-month treatment that consists of running for 30 minutes four times per week. You measure 25 individuals’ cholesterol levels before and after the treatment.

Study the descriptive statistics and summary output tables below and answer the questions that follow.

Descriptive Statistics

Variable

n

mean

SD

Time

Cholesterol Before Treatment

Cholesterol After Treatment

25

25

275.24

262.00

20.19

21.89

t-test

Variable

Mean Difference

SD

SE of Mean

t

Sig.

Cholesterol after treatment – cholesterol before treatment

-13.24

11.25

2.25

-5.88

.000

1. Given the information presented in the summary output table, write your decision about the null. Explain. Note: do not use any other tables, including tables of critical values

2. Write your conclusion (step 4) and interpretation of the results (step 5) in full sentences.

3. The confidence interval is not included in the summary output table. Without developing it, would it contain a zero or not? Explain.

Variable

n

mean

SD

Time

Cholesterol Before Treatment

Cholesterol After Treatment

25

25

275.24

262.00

20.19

21.89

Explanation / Answer

1. P-value <0.05 so we reject null hypothesis

2.P-value <0.05 so we reject null hypothesis. So we conclude that a person’s cholesterol statistically significantly decreases after running for 30 minutes four times per week.

3.No. Because Mean Difference is -13.26 and SE is 2.25

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.