d. Develop a boxplot for each method. Does a comparison of the boxplots support your conclusion in part (c)?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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I only need Part D. 

**Chapter 3: Descriptive Statistics: Numerical Measures**

Data:

- 353, 458, 404, 394, 416
- 437, 430, 369, 448, 430
- 431, 469, 446, 387, 445
- 354, 468, 422, 402, 360
- 444, 424, 441, 357, 435
- 461, 370, 413, 351, 352
- 384, 367, 417, 460, 352
- 445, 387, 468, 368, 430
- 384, 367, 436, 390, 464
- 405, 372, 401, 388, 367

**Questions:**

a. What is the mean number of minutes spent interacting with others for this sample? How does it compare to the mean reported in the study?

b. What is the standard deviation for this sample?

c. Are there any outliers in this sample?

---

**67. Work Commuting Methods**

Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.

- **Public Transportation**: 28, 29, 32, 37, 33, 25, 29, 32, 41, 34 
- **Automobile**: 29, 31, 33, 32, 34, 30, 31, 32, 35, 33 

**Tasks:**

a. Compute the sample mean time to get to work for each method.

b. Compute the sample standard deviation for each method.

c. On the basis of your results from parts (a) and (b), which method of transportation should be preferred? Explain.

d. Develop a boxplot for each method. Does a comparison of the boxplots support your conclusion in part (c)?
Transcribed Image Text:**Chapter 3: Descriptive Statistics: Numerical Measures** Data: - 353, 458, 404, 394, 416 - 437, 430, 369, 448, 430 - 431, 469, 446, 387, 445 - 354, 468, 422, 402, 360 - 444, 424, 441, 357, 435 - 461, 370, 413, 351, 352 - 384, 367, 417, 460, 352 - 445, 387, 468, 368, 430 - 384, 367, 436, 390, 464 - 405, 372, 401, 388, 367 **Questions:** a. What is the mean number of minutes spent interacting with others for this sample? How does it compare to the mean reported in the study? b. What is the standard deviation for this sample? c. Are there any outliers in this sample? --- **67. Work Commuting Methods** Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes. - **Public Transportation**: 28, 29, 32, 37, 33, 25, 29, 32, 41, 34 - **Automobile**: 29, 31, 33, 32, 34, 30, 31, 32, 35, 33 **Tasks:** a. Compute the sample mean time to get to work for each method. b. Compute the sample standard deviation for each method. c. On the basis of your results from parts (a) and (b), which method of transportation should be preferred? Explain. d. Develop a boxplot for each method. Does a comparison of the boxplots support your conclusion in part (c)?
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