3.67 The financial services call center in Problem 3.66 also moni-tors call duration, which is the amount of time spent speaking to cus-tomers on the phone. The file CallDuration contains the followingdata for time, in seconds, spent by agents talking to 50 customers:243 290 199 240 125 151 158 66 350 1141 251 385 239139 181 111 136 250 313 154 78 264 123 314 135 99420 112 239 208 65 133 213 229 154 377 69 170 261230 273 288 180 296 235 243 167 227 384 331a. Compute the mean, median, range, and standard deviation forthe call duration, which is the amount of time spent speaking to customers on the phone. Interpret these measures of centraltendency and variability.b. List the five-number summary.c. Construct a boxplot and describe its shape.d. What can you conclude about call center performance if a callduration target of less than 240 seconds is set?

Answered: Image /qna-images/answer/591daea9-eb60-4944-94bb-60734a0cc99a.jpg

Answered: 3.67 The financial services call center…

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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C8. According to the Pew Research Center (2015), recent immigrants are better educated than earlier immigrants to the United States. The change was attributed to the availability of better education in each region or country of origin. The percentage of immigrants 25 years of age and older who completed at least high school is reported in this table for 1970 to 2013. Write a statement describing the change over time in the percentage who completed at least a high school degree. 1970 1980 1990 2000 2013 Mexico 14 17 26 30 48 Other Central/South America 57 53 60 66 Asia 75 72 75 82 84 48 68 81 87 95 Europe 36 48 52 58 72 Caribbean 81 91 88 85 85 Africa Source: Pew Research Center, Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change Through 2065, 2015. Retrieved from https://www.pewresearch.org/hispanic/2015/09/28/modern- immigration-wave-brings-59-million-to-u-s-driving-population-growth-and-change-through-2065/ 52
The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoff point? The cutoff point is minutes. (Round to the nearest minute.)
Ralph Lauren Corporation (RL) designs, markets, and distributes a variety of apparel, home décor, accessory, and fragrance products. The company’s products include such brands as Ralph Lauren, Polo by Ralph Lauren, and Chaps. For two recent years, the company reported the following (in millions): Year 2 Year 1 Sales $7,230 $7,451 Accounts receivable (end of year) 517 655 The accounts receivable at the beginning of Year 1 was $588 million. a. Compute the accounts receivable turnover for Year 1 and Year 2. Round to one decimal place. Year 1 Year 2 Accounts Receivable Turnover fill in the blank 1 fill in the blank 2 b. Compute the number of days’ sales in receivables for Year 1 and Year 2. Use 365 days and round all calculations to one decimal place. Year 1 Year 2 Number of Days’ Sales in Receivables fill in the blank 3 days fill in the blank 4 days
Set A: n = 5; x = 10Set B: n = 50; x = 10(a) Suppose the number 32 is included as an additional data value in Set A. Compute x for the new data set. To compute x for the new data set, add 32 to x of the original data set and divide by 6. (Round your answer to two decimal places.) b.) Suppose the number 32 is included as an additional data value in Set B. Compute x for the new data set. (Round your answer to two decimal places.)
14. Suppose the following data represent the number of persons unemployed for a given number of months in Killeen, Texas. The values in the first column show the number of months unemployed and the values in the second column show the corresponding number of unemployed persons. Months Unemployed Number Unemployed 1,029 1,686 3 2,269 4 2,675 3,487 4,652 4,145 3,587 9. 2,325 10 1,120 Let x be a random variable indicating the number of months a randomly selected per- son is unemployed. a. Use the data to develop an empirical discrete probability distribution for x. b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution. c. What is the probability that a person is unemployed for two months or less? Unem- ployed for more than two months? d. What is the probability that a person is unemployed for more than six months?
In Problems, a.identify the population and variable under consideration. b.use the technology of your choice to obtain and interpret a frequency histogram, a relative-frequency histogram, or a percent histogram of the data. c.use the technology of your choice to obtain a dotplot of the data. d.use the technology of your choice to obtain a stem-and-leaf diagram of the data. e.identify the modality and symmetry (or nonsymmetry) of the distribution. f.if the distribution is unimodal and nonsymmetric, state whether it is right skewed or left skewed.Agricultural Exports. The U.S. Department of Agriculture collects data pertaining to the value of agricultural exports and publishes its findings in U.S. Agricultural Trade Update. For one year, the values of these exports, by state, are provided on the WeissStats site. Data are in millions of dollars.
2. Plot histogram and polygon diaerat! H.W(1) the data below represent workers' wages: 10 21 43 46 53 75 55 40 36 47 30 41 48 52 32 47 35 46 56 66 62 61 21 63 22 37 15 57 25 27 50 72 31 45 32 39 49 35 42 54 42 44 51 32 44 48 23 71 18 65 1. Create a frequency table. 3. Plot Ascending and descending cumulative frequency. 4. Find the number of workers who have wages less than 35$. 5. Find the percentage of the number of workers who their wages ranging are between (25-55)$.
1. A sales manager would like to see his sales representative’s unit sales per month. The secretary was told to keep a monthly record of the sales. The following are the data from the previous months (in ascending order): 5, 6, 8, 10, 10, 14, 15, 16, 16, 17, 17, 18, 19, 21, 21, 23, 26, 27, 28, 28, 28, 30, 38, 43. Compute for the median and mode. What is the range for the monthly sales?
The following data represent the monthly phone use, in minutes, of a customor onrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoff point? 530 496 331 467 548 346 511 377 411 415 360 339 363 372 343 477 474 333 610 441 The cutoff point isminutes. (Round to the nearest minute)

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