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5) A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data are collected from a sample of 15 customers during this hour. The file contains the results, which are also listed here: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 a) Compute the mean and median. b) Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c) Are the data skewed? If so, how? d) As a customer walks into the branch office during the lunch hour, she asks the branch manager how long she can expect to wait. The branch manager replies, "Almost certainly less than five minutes." On the basis of the results of (a) through (c), evaluate the accuracy of this statement.

5) A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data are collected from a sample of 15 customers during this hour. The file contains the results, which are also listed here: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 a) Compute the mean and median. b) Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c) Are the data skewed? If so, how? d) As a customer walks into the branch office during the lunch hour, she asks the branch manager how long she can expect to wait. The branch manager replies, "Almost certainly less than five minutes." On the basis of the results of (a) through (c), evaluate the accuracy of this statement.

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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QUESION 5 ONLY PART D JUST PART D PLEASE

5) A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data are collected from a sample of 15 customers during this hour. The file contains the results, which are also listed here: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 a) Compute the mean and median. b) Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c) Are the data skewed? If so, how? d) As a customer walks into the branch office during the lunch hour, she asks the branch manager how long she can expect to wait. The branch manager replies, "Almost certainly less than five minutes." On the basis of the results of (a) through (c), evaluate the accuracy of this statement. 6) The file contains the overall miles per gallon (MPG) of 2010 small SUVs: 24 23 22 21 22 22 18 18 26 26 26 19 19 19 21 21 21 21 21 18 19 21 22 22 16 16 Source: Data extracted from "Vehicle Ratings," Consumer Reports, April 2010, pp. 33-34. a) Compute the first quartile the third quartile and the interquartile range. b) List the five-number summary. c) Construct a boxplot and describe its shape. 7) The file contains the cost ($) per ounce for a sample of 14 dark chocolate bars: 0.68 0.72 0.92 1.14 1.42 0.94 0.77 0.57 1.51 0.57 0.55 0.86 1.41 0.90 Source: Data extracted from "Dark Chocolate: Which Bars Are Best?" Consumer Reports, September 2007, pp. 8. a) Compute the first quartile the third quartile and the interquartile range. b) List the five-number summary. c) Construct a boxplot and describe its shape.
Transcribed Image Text:5) A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data are collected from a sample of 15 customers during this hour. The file contains the results, which are also listed here: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 a) Compute the mean and median. b) Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c) Are the data skewed? If so, how? d) As a customer walks into the branch office during the lunch hour, she asks the branch manager how long she can expect to wait. The branch manager replies, "Almost certainly less than five minutes." On the basis of the results of (a) through (c), evaluate the accuracy of this statement. 6) The file contains the overall miles per gallon (MPG) of 2010 small SUVs: 24 23 22 21 22 22 18 18 26 26 26 19 19 19 21 21 21 21 21 18 19 21 22 22 16 16 Source: Data extracted from "Vehicle Ratings," Consumer Reports, April 2010, pp. 33-34. a) Compute the first quartile the third quartile and the interquartile range. b) List the five-number summary. c) Construct a boxplot and describe its shape. 7) The file contains the cost ($) per ounce for a sample of 14 dark chocolate bars: 0.68 0.72 0.92 1.14 1.42 0.94 0.77 0.57 1.51 0.57 0.55 0.86 1.41 0.90 Source: Data extracted from "Dark Chocolate: Which Bars Are Best?" Consumer Reports, September 2007, pp. 8. a) Compute the first quartile the third quartile and the interquartile range. b) List the five-number summary. c) Construct a boxplot and describe its shape.
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