Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

MATH 3070: Worksheet No.8 - Data Analysis and Hypothesis Testing in Exercises, Exams of Data Analysis & Statistical Methods

Tennessee Technological University (TTU)Data Analysis & Statistical Methods

A worksheet for math 3070 students, consisting of five exercises. Each exercise involves analyzing data from different studies using statistical methods such as summary statistics, boxplots, qq normal plots, and hypothesis testing (t-test or wilcoxon test). Students are required to present descriptions of the studies, compare groups, construct hypotheses, and discuss findings.

Typology: Exams

Pre 2010

Uploaded on 07/30/2009

koofers-user-gyz
koofers-user-gyz 🇺🇸

9 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
MATH 3070: Worksheet No.8
NAME:
1. Answer the following questions regarding the study in Exercise 6.20. (Data file: Chapter 6/ex6-
20.csv)
(a) Present a short description of the study and the data, including summary statistics for each
variable.
(b) Present the comparison of the two groups in boxplot. Then comment on the data based on
the visualization.
(c) Construct the null and the alternative hypothesis to determine whether there is a difference
in the distribution of SB2M for the two groups.
(d) Construct QQ normal plot for each group. Based on the findings in the plots, which
procedure, t-test or Wilcoxon test, appears more appropriate for comparing the two groups?
(e) Discuss your findings on the evaluation of the influence of alpha interferon.
2. Answer the following questions regarding the study in Exercise 6.21. (Data file: Chapter 6/ex6-
21.csv)
(a) Present a short description of the study and the data, including summary statistics for each
variable.
(b) Present the comparison of the two groups in boxplot. Then comment on the data based on
the visualization.
(c) Do the data provide sufficient evidence that there is a difference in the distributions of comb
weights for the two groups. Construct the null and the alternative hypothesis for the test.
(d) Which procedure, t-test or Wilcoxon test, seems most appropriate for evaluating the data
from this experiment?
(e) Discuss your findings on the evaluation of the different diets.
3. Answer the following questions regarding the study in Exercise 6.28. (Data file: Chapter 6/ex6-
28.csv)
(a) Present a short description of the study and the data, including summary statistics for each
variable.
(b) Present the comparison of the two groups in boxplot and scatter plot. Then comment on the
data based on the visualization.
pf2

Partial preview of the text

Download MATH 3070: Worksheet No.8 - Data Analysis and Hypothesis Testing in Exercises and more Exams Data Analysis & Statistical Methods in PDF only on Docsity!

MATH 3070: Worksheet No. NAME:

  1. Answer the following questions regarding the study in Exercise 6.20. (Data file: Chapter 6/ex6- 20.csv) (a) Present a short description of the study and the data, including summary statistics for each variable. (b) Present the comparison of the two groups in boxplot. Then comment on the data based on the visualization. (c) Construct the null and the alternative hypothesis to determine whether there is a difference in the distribution of SB2M for the two groups. (d) Construct QQ normal plot for each group. Based on the findings in the plots, which procedure, t-test or Wilcoxon test, appears more appropriate for comparing the two groups? (e) Discuss your findings on the evaluation of the influence of alpha interferon.
  2. Answer the following questions regarding the study in Exercise 6.21. (Data file: Chapter 6/ex6- 21.csv) (a) Present a short description of the study and the data, including summary statistics for each variable. (b) Present the comparison of the two groups in boxplot. Then comment on the data based on the visualization. (c) Do the data provide sufficient evidence that there is a difference in the distributions of comb weights for the two groups. Construct the null and the alternative hypothesis for the test. (d) Which procedure, t-test or Wilcoxon test, seems most appropriate for evaluating the data from this experiment? (e) Discuss your findings on the evaluation of the different diets.
  3. Answer the following questions regarding the study in Exercise 6.28. (Data file: Chapter 6/ex6- 28.csv) (a) Present a short description of the study and the data, including summary statistics for each variable. (b) Present the comparison of the two groups in boxplot and scatter plot. Then comment on the data based on the visualization.

(c) Test whether there is a difference in the mean yields for the two varieties of corn. (d) Estimate the difference in the mean yields of the two varieties. (e) State your conclusion of the study.

  1. Answer the following questions regarding the study in Exercise 6.29. (Data file: Chapter 6/ex6- 29.csv) (a) Present a short description of the study and the data, including summary statistics for each variable. (b) Present the comparison of the two groups in boxplot and scatter plot. Then comment on the data based on the visualization. (c) Construct QQ normal plot for the change. Do the normality assumption for paired t-test appear to be valid for the data? (d) Is there significant evidence that the mean SENS value decreased after the patient received antihypertensive treatment? (e) Estimate the change in the mean SENS value. (f) State your conclusion of the study.
  2. Answer the following questions regarding the study in Exercise 6.36. (Data file: Chapter 6/ex6- 36.csv) (a) Present a short description of the study and the data, including summary statistics for each variable. (b) Present the comparison of the two groups in boxplot and scatter plot. Then comment on the data based on the visualization. (c) Use the paired t-test to determine whether the distribution of heart rates for the dogs when receiving Benzedrine is shifted to the right of that for the same animals when on the placebo. (d) Use the Wilcoxon signed rank test to investigate the same claim as above. (e) Construct QQ normal plot for the change. Which procedure, paired t-test or Wilcoxon test, is more appropriate in this analysis? (f) State your conclusion of the study.