Call centers today play an important role in managing day-to-day business communications with customers. Call centers must be monitored with a comprehensive set of metrics so that businesses can better understand the overall performance of those centers. One key metric for measuring overall call center performance is service level, the percentage of calls answered by a human agent within a specified number of seconds. The table below contains the following data for time, in seconds, to answer 50 incoming calls to a financial services call center. E Click the icon to view the data. a. Construct a frequency distribution and a percentage distribution. b. Construct a cumulative percentage distribution. c. What can you conclude about call center performance if the service level target is set as "80% of calls answered within 20 seconds"? - X Data table a. Construct a frequency distribution and a percentage distribution. Construct a frequency distribution. Time 18 15 17 17 7 0 Frequency (seconds) 14 15 6 18 19 5 - 9 15 22 6 18 10 - 14 14 13 20 15 15 - 19 16 15 13 24 20 - 24 18 12 9 6 14 25 11 11 13 24 25 29 8 10 14 14 23 30 - 34 21 18 13 24 31 (Type integers or decimals. Do not round.) 14 19 7 16 13

In 2011 home prices and mortgage rates dropped so low that in a number of cities the monthly cost of owning a home was less expensive than renting. The following data show the average asking rent for 10 markets and the monthly mortgage on the median priced home (including taxes and insurance) for 10 cities where the average monthly mortgage payment was less than the average asking rent (The Wall Street Journal, November 26–27, 2011).Click on the datafile logo to reference the data.     Enter negative values as negative numbers. a.  Develop the estimated regression equation that can be used to predict the monthly mortgage given the average asking rent (to 2 decimals).The regression equation is:Mortgage ($) =  +  Rent ($)

Determine whether the following examples are discrete or continuous data sets. Write "DISCRETE" for discrete and "CONTINUOUS" for continuous. (without quotations - use for instance copy and paste to avoid typos) (a) The number of customers waiting in line at the grocery store. answer: (b) The length of time needed for a student to complete a homework assignment. answer: (c) The distance traveled by a city bus each day. answer: (d) The length of time it takes to fill up your gas tank. answer:

The Federal Bureau of Investigation (FBI), as part of its internal security mission, serves as a database for all the reported crimes committed in the United States. One question that might be of interest is does having more police officers reduce the number of homicides? To investigate this claim, the 2013 data from the twenty largest municipal cities was supplied by the FBI's Uniform Crime Report. Below are two observations from the dataset: > head (cities) City Pop Homicides Police Density MedHome Mayor 1 New York 8175.133 335 4.2595 27016.30 5.5390 1 2 Chicago 2695.598 414 4.4309 11843.58 1.8310 The variables included in the study are: Name of city Population of city in 1,000s of people Number of homicides in the year 2013 Number of police officers per 1,000 people Number of people per square mile Median home price in $100,000 1 if city has a "Strong Mayor" form of government; 0 if not City Рор Homicides Police Density MedHome Мayor Model: log(u;) = Bo + B1Police; + B2MedHome; +…

A magazine published data on the best small firms in a certain year. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 64 ranked firms. Relative Frequency Age 40-44 3 45-49 11 50-54 19 55-59 60-64 10 65-69 2 70-74 1 Frequency Cumulative Relative Frequency (a) What is the frequency for CEO ages between (but not including) 54 and 65? (Enter your answer as a whole number.) 28 (b) What percentage of CEOs are 65 years or older? (Round your answer to the nearest whole number.) 8 (c) What is the relative frequency of ages under 50? (Round your answer to two decimal places.) 0.23 (d) What is the cumulative relative frequency for CEOs younger than 55? (Round your answer to two decimal places.) 0.47 (e) Which graph shows the relative frequency? Relative Frequency 1.0 0.8 0.6 Relative…

The higher education department of Holmes Institute recorded data on the number of students enrolled in the different study majors for the years 2018 and 2019.   Study major 2018 2019 Statistics 1700 2250 Business law 700 900 Accounting 1300 1450 Economics 750 1000 Finance 1450 1758 Marketing management 1069 1189 Auditing 360 351   Use an appropriate graphical technique or chart to compare the number of enrolment in 2018 and 2019 of the different study major. Display the chart. Use an appropriate graphical technique or chart to display the percentage value of the number of enrolment of the different study major in 2018 and 2019. Display the chart.

The hospital plans to improve patient experience at its facility. As a part of plan, you are provided with the data of ages of patients visiting an orthopaedic department. The head of the hospital needs to know which age group visits the department most to take few improvements in order to make the department more patient friendly. As a hospital administrator, you are required to summarize and present the data using suitable techniques professionally.

The following tables list the ages of female and male actors when they starred in their award-winning Best Actor performances. (A graphing calculator is recommended.) Ages of Best Female Actor Award Recipients   51  53  65  54  51  75  56  59  61  73  71  31    47  45  41  37  65  70  60  47  31  76  55    65  42  25  69  78  78  53  27  41  41  29   Ages of Best Male Actor Award Recipients   50  59  64  72  71  76  73  43  32  32  43  34    64  47  45  31  46  48  57  57  59  66  64    68  64  61  30  71  55  43  74  65  73  69   (a) Find the mean and the sample standard deviation of the ages of the female recipients. Round each result to the nearest tenth. mean      yr sample standard deviation      yr  (b) Find the mean and the sample standard deviation of the ages of the male recipients. Round each result to the nearest tenth. mean      yr sample standard deviation      yr  (c) Which of the two data sets has the larger mean? female actors male…

The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of a company's success is customer service. A study was conducted to determine the customer satisfaction levels for one overnight shipping business. In addition to the customer's satisfaction level, the customers were asked how often they used overnight shipping. The results are shown in the following table: 1. Satisfaction level Frequency of Use 5 per month TOTAL 100 70 25 220 460 20 700 Suppose that one customer who participated in the study is chosen at random. What is the probability that the customer had a low level of satisfaction and used the company less than two times per month?

Many freeways have service (or logo) signs that give information on attractions, camping, lodging, food, and gas services prior to off-ramps. These signs typically do not provide information on distances. An article reported that in one investigation, six sites along interstate highways where service signs are posted were selected. For each site, crash data was obtained for a three-year period before distance information was added to the service signs and for a one-year period afterward. The number of crashes per year before and after the sign changes were as follows. Before: 14 29 62 123 64 62 After: 15 27 41 84 76 71 (a) The article included the statement "A paired t test was performed to determine whether there was any change in the mean number of crashes before and after the addition of distance information on the signs." Carry out such a test. [Note: The relevant normal probability plot shows a substantial linear pattern.] State and test the appropriate hypotheses. (Use a = 0.05.)…