Question

After the 8-week program, those who participated in the aquarobic program had their ending cholesterol measured,...

After the 8-week program, those who participated in the aquarobic program had their ending cholesterol measured, and the change in cholesterol was recorded for each participant. Estimate the mean cholesterol change using 90% confidence.

1) The formula which should be used for this interval is:

2) With __ % confidence, we estimate that the mean cholesterol before participating in 8 weeks of aquarobics is between __ mg and __ mg than the mean cholesterol after participation. Note: Round the limits of your interval to three decimal places. In the last box type the appropriate word - moreor less. Think carefully about what positive and negative differences mean about the change in cholesterol based on how the differences were taken.

Difference Sample Diff. Std. Error Critical Pt
Pre - Post 17.1167 0.8569 1.6909

3) A 90% confidence interval was also calculated for the change in total cholesterol (pre - post) for the control group. That interval was found to be (-0.83, 2.902). Based on this interval and the one which you calculated for the aquarobic group, what conclusion would you draw?

Both groups had a significant decrease in mean cholesterol. However, the decrease for the aquarobic group was larger.

(a)The mean cholesterol for the control group increased, while the aquarobic group had a significant decrease in mean cholesterol.

(b)Neither group had a significant change in mean cholesterol.

(c)The aquarobic group did not have a significant change in mean cholesterol, while the control group had a significant increase in mean cholesterol.

(d)The control group did not have a significant change in mean cholesterol, while the aquarobic group had a significant decrease in mean cholesterol.

Homework Answers

Answer #1

1)
formula
=(xbar - t * sd/sqrt(n) , xbar+ t * sd/sqrt(n))
standard error = sd/sqrt(n)

2)
90 % confidence interval
(17.1167 - 1.6909 * 0.8569 , 17.1167 + 1.6909 * 0.8569)
= (15.6677 , 18.56563221)
=(16.668,18.566)

3)
since 0 is present in confidence interval , we fail to reject the null hypothesis

hence
option (d)The control group did not have a significant change in mean cholesterol, while the aquarobic group had a significant decrease in mean cholesterol.
is correct

Please rate

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A group of adults with elevated cholesterol levels participated in a diet and exercise program to...
A group of adults with elevated cholesterol levels participated in a diet and exercise program to determine the effect of this program on their cholesterol. The resulting data follows: Subject Before After 1 259 244 2 260 250 3 272 246 4 260 235 5 281 273 6 254 245 Test the hypothesis that the diet and exercise program lowered the subject's total chloresterol by at least 15 points. alpha = .05. a. Find the mean of the differences.   b....
In a test of the effectiveness of garlic for lowering​ cholesterol, 42 subjects were treated with...
In a test of the effectiveness of garlic for lowering​ cholesterol, 42 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes ​(before-after) in their levels of LDL cholesterol​ (in mg/dL) have a mean of 3.2 and a standard deviation of 15.9. Construct a 90​% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness...
In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with...
In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in the levels of LDL cholesterol (in mg/dL) have a mean of 3.3 and a standard deviation of 17.9. a) what is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment? b) Construct a 90% confidence interval estimate of...
4. The effectiveness of an intervention program for teaching children about child abuse was examined by...
4. The effectiveness of an intervention program for teaching children about child abuse was examined by administering a 16-question test to children before and after participating in the program. As an example, the first question asked what would be the best thing to do if you saw someone shaking a baby. (The correct response was to tell the person to stop and tell another adult.) The change in percentage correct, post-test minus pre-test, was recorded for each question, and a...
Ordway et al. (2014) conducted a longitudinal follow-up study of a randomized controlled trial (RCT) to...
Ordway et al. (2014) conducted a longitudinal follow-up study of a randomized controlled trial (RCT) to determine the effects of the Minding the Baby (MTB) home visiting program on parental reflective functioning (RF) and on child behavior. The study included intervention and control groups, and the women who participated in the MTB intervention described their children as having significantly fewer externalizing child behaviors post intervention. However, there was no significant difference between the intervention and control groups for parental RF....
In this second portion of the Final Exam, you will critically evaluate a quantitative research study...
In this second portion of the Final Exam, you will critically evaluate a quantitative research study on a social science topic. Your instructor will post an announcement with the reference for the article assigned for the exam. The study will be from a peer-reviewed journal and published within the last 10 years. In the body of your critique, describe the statistical approaches used, the variables included, the hypothesis(es) proposed, and the interpretation of the results. In your conclusion, suggest other...
PUBH 6033—Week 7 Assignment 1 Comparing two means: When drink drove a student to statistics (Rubric...
PUBH 6033—Week 7 Assignment 1 Comparing two means: When drink drove a student to statistics (Rubric included) Instructions For this assignment, you review this week’s Learning Resources and then perform a two-sample independent t test and an ANOVA related to the dataset that was utilized in the week 2 SPSS application assignment. Import the data into SPSS; or, if you correctly saved the data file in Week 2, you may open and use that saved file to complete this assignment....
Q1.Researchers were interested in determining the relative effectiveness of two different brands of eye drops in...
Q1.Researchers were interested in determining the relative effectiveness of two different brands of eye drops in alleviating the symptoms of 'dry eye syndrome'. Forty subjects, who suffered from 'dry eye syndrome', were randomly assigned to receive either brand A or brand B of the eye-drops - 20 subjects to each brand. The eyedrops were administered to each subject and the time until symptoms returned was recorded for each subject. Based on the information provided, which of the following statement/s is...
What role could the governance of ethics have played if it had been in existence in...
What role could the governance of ethics have played if it had been in existence in the organization? Assess the leadership of Enron from an ethical perspective. THE FALL OF ENRON: A STAKEHOLDER FAILURE Once upon a time, there was a gleaming headquarters office tower in Houston, with a giant tilted "£"' in front, slowly revolving in the Texas sun. The Enron Corporation, which once ranked among the top Fortune 500 companies, collapsed in 2001 under a mountain of debt...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...