Application Questions (60 Credits) When answering the hypothesis testing questions, please follow the five-step template: 1) Defining hypotheses, 2) Specifying the confidence and significance levels, 3) Choosing the test, 4) Getting the p-value using R, 5) Conclusion. In step 4), provide necessary R functions. 21. A broker is studying two foundations and the success rates of their investments. The data are listed in the table below: Success Failure Total Foundation A Foundation B Total 15 5 4 19 8 13 20 12 32 Define hypothesis and test whether the two foundations have homogeneous success rates. 22. A sample of accounting practices (straight line, declining balance, or both) in three countries (France, Germany, and United Kingdom) is saved in "Accounting Practice" spreadsheet. a. Define and test whether the ratio of the three accounting practices (straight line: declining balance: both) is the same as 8:5:7 at 95% confidence level. b. Define and test whether the proportions of accounting practices are homogeneous in the three countries at 5% significance level. 23. The manager of a retail chain wants to determine whether mean monthly store traffic is dependent on one of the four regions of the country. The manager collects monthly store traffic data from 10 randomly selected stores in each of the four regions. The data is saved in the "Store Traffic" spreadsheet. Use the data to find out an answer for the manager at 99% confidence level.
Application Questions (60 Credits) When answering the hypothesis testing questions, please follow the five-step template: 1) Defining hypotheses, 2) Specifying the confidence and significance levels, 3) Choosing the test, 4) Getting the p-value using R, 5) Conclusion. In step 4), provide necessary R functions. 21. A broker is studying two foundations and the success rates of their investments. The data are listed in the table below: Success Failure Total Foundation A Foundation B Total 15 5 4 19 8 13 20 12 32 Define hypothesis and test whether the two foundations have homogeneous success rates. 22. A sample of accounting practices (straight line, declining balance, or both) in three countries (France, Germany, and United Kingdom) is saved in "Accounting Practice" spreadsheet. a. Define and test whether the ratio of the three accounting practices (straight line: declining balance: both) is the same as 8:5:7 at 95% confidence level. b. Define and test whether the proportions of accounting practices are homogeneous in the three countries at 5% significance level. 23. The manager of a retail chain wants to determine whether mean monthly store traffic is dependent on one of the four regions of the country. The manager collects monthly store traffic data from 10 randomly selected stores in each of the four regions. The data is saved in the "Store Traffic" spreadsheet. Use the data to find out an answer for the manager at 99% confidence level.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Application Questions (60 Credits)
When answering the hypothesis testing questions, please follow the five-step template: 1)
Defining hypotheses, 2) Specifying the confidence and significance levels, 3) Choosing the test, 4)
Getting the p-value using R, 5) Conclusion. In step 4), provide necessary R functions.
21. A broker is studying two foundations and the success rates of their investments. The data are
listed in the table below:
Success
Failure
Total
Foundation A
Foundation B
Total
15
5
4
19
8
13
20
12
32
Define hypothesis and test whether the two foundations have homogeneous success rates.
22. A sample of accounting practices (straight line, declining balance, or both) in three countries
(France, Germany, and United Kingdom) is saved in "Accounting Practice" spreadsheet.
a. Define and test whether the ratio of the three accounting practices (straight line:
declining balance: both) is the same as 8:5:7 at 95% confidence level.
b. Define and test whether the proportions of accounting practices are homogeneous in the
three countries at 5% significance level.
23. The manager of a retail chain wants to determine whether mean monthly store traffic is
dependent on one of the four regions of the country. The manager collects monthly store
traffic data from 10 randomly selected stores in each of the four regions. The data is saved in
the "Store Traffic" spreadsheet. Use the data to find out an answer for the manager at 99%
confidence level.
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