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8. In 2007 the New York Times reported that the median annual household income in the United States was $55.500 (New York Times website, August, 21, 2013). Answer the following questions based on the following sample of 14 household incomes for 2013 (S1000s). 48.7 51.3 46.5 52,1 52.9 52.1 51.2 49.4 52.4 53.4 51.6 52.5 52.2 64.5 a. What is the median houschold income for the sample data for 2013? b. Based on the sample data, estimate the percentage change in the median household income from 2007 to 2013. c. Compute the first and third quartiles.

8. In 2007 the New York Times reported that the median annual household income in the United States was $55.500 (New York Times website, August, 21, 2013). Answer the following questions based on the following sample of 14 household incomes for 2013 (S1000s). 48.7 51.3 46.5 52,1 52.9 52.1 51.2 49.4 52.4 53.4 51.6 52.5 52.2 64.5 a. What is the median houschold income for the sample data for 2013? b. Based on the sample data, estimate the percentage change in the median household income from 2007 to 2013. c. Compute the first and third quartiles.

MATLAB: An Introduction with Applications
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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469 430 446 422 441 470 354 468 387 445 444 424 402 360 461 407 357 435 464 374 413 351 417 445 387 460 352 468 384 367 368 430 405 436 390 464 372 401 388 367 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? a. C. Are there any outliers in this sample? 57. 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 Compute the sample mean time to get to work for each method. b. Compute the sample standard deviation for each method. 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 (e)? a. C. 8. In 2007 the New York Times reported that the median annual household income in the United States was $55,500 (New York Times website, August, 21, 2013). Answer the following questions based on the following sample of 14 household incomes for 2013 (S1000s). 51.3 52.1 52.4 64.5 53.4 51.6 48.7 52.5 52.1 51.2 49.4 46.5 52.9 52.2 What is the median household income for the sample data for 2013? b. Based on the sample data, estimate the percentage change in the median household income from 2007 to 2013. a. c. Compute the first and third quartiles.
Transcribed Image Text:469 430 446 422 441 470 354 468 387 445 444 424 402 360 461 407 357 435 464 374 413 351 417 445 387 460 352 468 384 367 368 430 405 436 390 464 372 401 388 367 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? a. C. Are there any outliers in this sample? 57. 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 Compute the sample mean time to get to work for each method. b. Compute the sample standard deviation for each method. 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 (e)? a. C. 8. In 2007 the New York Times reported that the median annual household income in the United States was $55,500 (New York Times website, August, 21, 2013). Answer the following questions based on the following sample of 14 household incomes for 2013 (S1000s). 51.3 52.1 52.4 64.5 53.4 51.6 48.7 52.5 52.1 51.2 49.4 46.5 52.9 52.2 What is the median household income for the sample data for 2013? b. Based on the sample data, estimate the percentage change in the median household income from 2007 to 2013. a. c. Compute the first and third quartiles.
53.834 KB) es 1 & 2 only). PR 11-3A. You must SHOW YOUR WORK on ut your work for EX11-9 in the submission box or upplementary Exercises 157 d. Provide a five-number summary. e. Using the z-score approach, do the data contain any outliers? Does the approach that uses the values of the first and third quartiles and the interquartile range to detect outli- ers provide the same results? 9. The data contained in the DATAfile named FoodIndustry show the company/chain name. the average sales per store ($1000s), and the food segment industry for 47 restaurant chains (Quick Service Restaurant Magazine website, August 2013). What was the mean U.S. sales per store for the 47 restaurant chains? b. What are the first and third quartiles? What is your interpretation of the quartiles? Show a boxplot for the level of sales and discuss if there are any outliers in terms of sales that would skew the results. d. Develop a frequency distribution showing the average sales per store for each seg- ment. Comment on the results obtained. a. C. 70. Travel + Leisure magazine provides an annual list of the 500 best hotels in the world. The magazine provides a rating for each hotel along with a brief description that includes the size of the hotel, amenities, and the cost per night for a double room. A sample of 12 of the top-rated hotels in the United States follows Hotel Location Rooms Cost/Night Boulders Resort & Spa Disney's Wilderness Lodge 499 Phoenix, AZ Orlando, FL 220 727 285 340 585
Transcribed Image Text:53.834 KB) es 1 & 2 only). PR 11-3A. You must SHOW YOUR WORK on ut your work for EX11-9 in the submission box or upplementary Exercises 157 d. Provide a five-number summary. e. Using the z-score approach, do the data contain any outliers? Does the approach that uses the values of the first and third quartiles and the interquartile range to detect outli- ers provide the same results? 9. The data contained in the DATAfile named FoodIndustry show the company/chain name. the average sales per store ($1000s), and the food segment industry for 47 restaurant chains (Quick Service Restaurant Magazine website, August 2013). What was the mean U.S. sales per store for the 47 restaurant chains? b. What are the first and third quartiles? What is your interpretation of the quartiles? Show a boxplot for the level of sales and discuss if there are any outliers in terms of sales that would skew the results. d. Develop a frequency distribution showing the average sales per store for each seg- ment. Comment on the results obtained. a. C. 70. Travel + Leisure magazine provides an annual list of the 500 best hotels in the world. The magazine provides a rating for each hotel along with a brief description that includes the size of the hotel, amenities, and the cost per night for a double room. A sample of 12 of the top-rated hotels in the United States follows Hotel Location Rooms Cost/Night Boulders Resort & Spa Disney's Wilderness Lodge 499 Phoenix, AZ Orlando, FL 220 727 285 340 585
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