Questions and Answers of Principles Of Managerial Statistics

There are also two levels of measurement for numerical variables. Interval scale applies to numerical variables with a zero value defined arbitrarily. Temperatures in Celsius are an example; the zero
Give an example of a parameter and a statistic for the following.a) Political electionsb) Subaru 2017 Forester vehiclesc) College studentsd) Adults in the United States
Insurance company X would like to determine the proportion of all medical doctors who have been involved in at least one malpractice lawsuit during their career. The company selects 100 doctors at
The 2016 General Social Survey included the following question: do you happen to have in your home (IF HOUSE: or garage) any guns or revolvers? Identify below the population, parameter, sample, and
You are in charge of a local company who wants to obtain mean income of the company’s engineers to compare with the mean income of engineers in the industry. You can either obtain the population
In the following scenarios, state whether primary or secondary data will be used.a) For her research project, a student created a survey to collect data from 200 participants.b) A company that
Considering the study objectives presented below, provide an example of an experimental and an observational study.a) Measure drone battery life.b) Determine if feeding chickens organic corn is
From the provided study descriptions, state whether the study was experimental or observational.a) A researcher is carrying out a study on the reliability of four different solar systems. She has
Suppose you ask all your friends whether they believe in the afterlife. Can you use this data to make conclusions on the percentage of all people who believe in the afterlife? Explain in one sentence.
In the following scenarios, state whether primary or secondary data is being used.a) In an effort to understand their education system and how it can be improved, city managers download data from the
Eight years ago, company X acquired new machines to can food. The machines were designed to produce a box of 24 cans in two minutes. In an effort to assess productivity, managers at company X will
Determine if the following is a statistical question.a) How many bathrooms does your house have?b) Did Jeff earn more in 2018 than in 2017?
Determine if the following is a statistical question.a) Does uncertainty on which candidate to vote for depend on political party affiliation?b) Is car tire diameter associated with miles per gallon?
In the following, state whether the data adequately addresses the (implied) statistical question.a) To identify whether yearly cancer rates are increasing, 2018 cancer data will be used.b) In an
In the following, state whether the data adequately addresses the (implied) statistical question.a) Have new bad weather protocols effectively reduced flight delay times at the John F. Kennedy (JFK)
With the topics below,(i) Develop statistical questions,(ii) Explain how to answer the questions with statistics, and(iii) Try to find online data to conduct a statistical analysis (to answer your
Answer the following questions using the relative frequency distribution below:a) What is the relative frequency of Category B?b) If the data set consisted of 400 observations, how many times did
With the topics below,(i) Develop statistical questions, (ii) Explain how to answer the questions with statistics, and(iii) Try to find online data to conduct a statistical analysis (to answer
The Canadian Dairy Information Centre compiles from several companies’ information on the cheeses made from cow, goat, sheep, and buffalo milk.The chart below summarizes the cheese type.a) Which
In Problem 3.2, some Cheeses are organic. The chart below summarizes the cheese type based on whether they are Organic (Yes, No):a) Does it seem that whether Cheese is organic or not has an impact on
The gender of employees according to Charlotte-Mecklenburg Police Department demographic data is summarized below:a) Which gender is more common in Charlotte-Mecklenburg PoliceDepartment?b) What is
The following table summarizes the medical and mental healthcare services provided to people who may still be sick from 9/11 attacks from 2008 to 2011. Construct a bar plot of the counts.
Administrators for the City of Austin, Texas, randomly send surveys to residents with the aim to gauge their opinion about services. The Pareto chart below summarizes the answers to the evaluation of
The file “2015_APD_Traffic_Fatalities_Austin” has data on fatal traffic accidents at Austin, Texas, during4 2015.a) Construct a bar chart for the number of fatal accidents by type of accident.b)
The following figure presents a histogram of the number of monthly catch basins cleaned by Los Angeles Sanitation, during the Fiscal Year 2014 until mid Fiscal Year 2017.a) What is roughly the
Answers to the 2016 community survey from respondents in Chattanooga are available (filename 2016_Community_Survey_Results_Chattanooga). Use a Pareto chart to summarize the respondents’ answers to
Administrators of the San Francisco airport conduct a survey every year to analyze guest satisfaction.a) Download the 2011 data “2011_SFO_Customer_Survey.”b) Visualize the responses of guests for
Download the file “Air_Traffic_Landings_Statistics” with data on Air traffic landings for San Francisco:a) Check the minimum and maximum “Landing Count.”b) Draw a histogram of Landing
Download data on London animal rescue incidents, “Animal Rescue London”:a) Draw a histogram of Incident nominal cost for 2017. Interpret the results.b) Are incidents more common with dogs or
The chart below presents quarterly criminal domestic violence data from Edmonton, Canada. Q1 stands for the first quarter of every year.a) Approximately how many cases of criminal domestic violence
Use the data set “EPS_Domestic_Violence” to reproduce the chart from Problem 3.14.Data from Problem 3.14The chart below presents quarterly criminal domestic violence data from Edmonton, Canada.
New York City chronic lower respiratory disease mortality rates for White Non-Hispanic men and women are available below:a) Build a line chart for the mortality rates of men. Does there appear to be
Dashboards: visual displays of multiple data set variables have become very popular because they provide decision makers a quick presentation of the overall status of a situation. The figure below is
Returning to 2014 alcohol-related deaths in England, when considering death classification and gender (table below), determine if each statement is appropriate.a) According to the data, 369 people in
Yearly water use per capita in New York City is available (“NYC_Water_ Consumption”). Draw a line chart for water use per capita. Interpret chart.
In the 2016 San Diego vehicle stops case study, the indication was that vehicle stops were more frequent for White drivers followed by Hispanics (see Figure 3.17). Explain why this makes sense.
Figure 3.10 shows age histograms by driver’s race for moving violation stops in San Diego involving a search. The figure below displays the age histograms by driver’s race for moving violation
Using the dashboard above, state whether each statement is true or false.a) Yearly retail gross sales are usually lower than medical gross sales.b) August is usually among the months with the highest
The dot plots below show the use of energy over several ZIP Codes in the area surrounding Nashville, Tennessee, in February 2017. Interpret. I. *************** ***** we www + 1. Commercial Outdoor
According to 2016–2017 Chicago school data, the following scatterplot shows school college enrollment rate versus average American College Testing (ACT) test scores.a) What happens to college
The following scatterplot displays the number of people exposed to 65 dB or more of railway road noise at night versus number of people exposed to 65 dB or more of industrial road noise at night for
Using the data file “2014_Housing_Market_Analysis_Data_by_Zip_Code,” reproduce the scatterplots of Austin, Texas, housing market data presented in Figure 3.12. Median home value ($
Using the data “2014_Housing_Market_Analysis_Data_by_Zip_Code,” produce a scatterplot of unemployment and median rent at Austin, Texas. Interpret.
Which countries provide their citizens with the best higher education? The figure below presents one summary the World Economic Forum used to address this question. On the left, it shows the number
Scatterplots are useful tools to visualize the association between two numerical variables. When the data is highly discretized – there are large gaps among variable values – the scatterplot can
The bar chart below summarizes the 2014 percentage of total electricity output that comes from renewable sources for several countries. According to the chart,a) for Brazil, what was the approximate
Use the complaint data below to reproduce Figure 3.2, a Pareto Chart.Figure 3.2 Category Shipping Defective product Customer service Packaging Price Total Frequency 299 21 198 342 40 900
You want to make a graph to display the proportion of faculty members in each of the academic ranks at your institution. The best choice of graph isa) Scatterplot.b) Bar chart.c) Histogram.d) Pie
Many places establish rebate programs to promote energy savings. For example, Delaware has a rebate program for the purchase or lease of alternative fuel vehicles. Data is available to the public
A survey of members of the LGBT community in the European Union included questions about whether the person experienced violence or harassment in the last five years, which happened at least partly
Using the data set from Problem 3.33, construct aa) Frequency table of the vehicle type. Interpret.b) Contingency table of gender and vehicle type.Data from in Problem 3.33Many places establish
In an article published in 2017 in The Economist in collaboration with Igarapé Institute, homicide data from many cities around the world were analyzed. The figure below summarizes homicides for the
From Table 3.4,a) Construct an appropriate visual summary for the total poverty ratio data presented in the table.b) Construct an appropriate visual summary for the poverty ratio data by age. Table
Using Buffalo New York curb recycling data from January 2011 until June 2018, the line chart below was constructed. Discuss the global trend behavior. Date Sep 10 Oct 10 on 10 Noov 10 Dec 10 Jan
The file “Buffalo_Monthly_Recycling” has the data used to construct the line chart below, and more. Download the file and construct a line chart for type “Curb Garbage.” Interpret. Date Sep
Technology has made data visualization accessible to everyone. Indeed, this is a good thing. Yet it is up to the user to properly use visualization tools. Below is a pie chart built a few years back,
Every year, administrators of the San Francisco airport conduct a survey to analyze guest satisfaction. Download the 2011 data “2011_SFO_Customer_Survey.”a) Visualize the responses of guests for
In practice, bar charts are used occasionally to summarize a numerical variable over time, which can be handy. The bar chart below shows the inflation rate based on the Consumer Price Index in India.
When constructing histograms, the statistical software being used will commonly determine how the graph looks. In Example 3.2, histograms were developed to summarize diversion rates in New York City
The figure below presents the association between cheese fat percentage and moisture percentage using data from Canada. Points are color coded by whether the cheese is organic. Interpret. Fat
Continuing from Problem 3.44, using Minitab and the file “Recycling_Diversion_and_Capture_Rates”:a) Construct a histogram for diversion rates, fiscal year 2018, in New York City.b) Modify the
Answers to the 2016 community survey from respondents in Chattanooga are available (filename “2016_Community_Survey_Results_ Chattanooga”). Use an appropriate chart to summarize the
Using the data from Problem 3.46:a) Cross tabulate the answers to questions “Q1a” and “Q1c.”b) Build a bar chart of “Q1c” stacked by “Q1a.”c) Based on the stacked bar chart, do you
The figure below summarizes domestic violence data from Bloomington, Indiana, from October 2011 to April 16, 2017. It focuses on cases where the authorities determined there was no alcohol, mental
Data on leading cause of death between 2007 and 2014 for New York City are available online. Build a tabular summary by “Year” and “Race Ethnicity” variables of the deaths for which the
In 2005, Florida lawmakers passed the controversial “Stand Your Ground” law, which broadened the situations in which citizens can use lethal force to protect themselves against perceived threats.
In the textbook companion site, access the motion chart for the Baltimore housing data. Set the x axis to “% of Residential Properties Vacant” and the y axis to “% of Properties Under Mortgage
In the textbook companion site, access the motion chart for the Baltimore housing data. Set the x axis to “% of Housing Units that are Owner-Occupied” and the y axis to “% of Residential
In the textbook companion site, access the motion chart for the Baltimore housing data. Set the x axis to “% of Housing Units that are Owner-Occupied” and the y axis to “% of Residential
In the textbook companion site, access the motion chart for the Baltimore housing data. Set the x axis to “% of Residential Properties Vacant” and the y axis to “% of Properties Under Mortgage
In the Baltimore housing data motion chart, go to the bar chart tab and set the y axis to “% of Properties Under Mortgage Foreclosure” (leave the x axis on “Order: % of Properties Under
In the Baltimore housing data motion chart, go to the bar chart tab and set the y axis to “Median Price of Homes Sold” (leave the x axis on “Order: Median Price of Homes Sold”).a) In 2005,
Returning to the Baltimore housing data motion chart. Set the x axis to “% of Residential Properties Vacant” and the y axis to “% of Properties Under Mortgage Foreclosure.” What part of the
In the textbook companion site, access the motion chart for Puerto Rico workforce data. Set the x axis to “Time” and the y axis to “Population.”a) Place a check mark on San Juan in the bottom
When frequencies of several categories of a variable are available over time, a stacked area chart can be constructed. The figure below illustrates the monthly behavior of different types of
NOAA has records for many weather stations around the world. Temperature, cloud coverage, and rainfall are just some of measurements that can be extracted from these stations. The rainfall data is at
Compared to structured data, it is harder to determine patterns when data strictly consists of unstructured text. In this case, visualization can be very useful. A word cloud is a visual
Using the following data,show thata) X̅ = 6.46.b) median = 7.21. 9.71 4.25 3.75 9.42 8.33 7.21 2.55
For a sample: 4.5, 6.2, 7.4, 3.2, 4.5, 4.7, 5.1a) Calculate X̅.b) Find the median.c) Find the mode.
Here is a random sample of five “hours per week playing video games” answers.2, 8, 4, 2, 7, 10a) Calculate the average (mean) of this random sample.b) Find the median.c) Find the mode.
Data on daily units and legal sales (in $) of several marijuana products in Washington since July 2014 are available. Use the Minitab snapshot of the data presented below:a) To find the “Marijuana
You are told that a sample of 170 cans of tuna was taken to test if too much tuna (more weight) occurs too often. The personnel tells you that although they do not know much about the stated study,
You are asked about how 25 observations of light bulb power (in watts) are grouped (i.e. centralized), but only told that the sample median is 125 watts and the sample mean is 62 watts.a) What is the
Madison Water Utility offers bill credits (rebates) for customers who replace high water using toilets with EPA WaterSense-rated High Efficiency Toilet models. Monthly average rebates can be
According to the 2013 Canadian General Social Survey, the average hours a year, contributed by volunteers, is 154, while the median hours a year is 53.a) What is the shape of the data’s
Refer to Example 4.3.a) Show that the mean number of children for teenage females is 0.35.b) Show that the median number of children for teenage males is 0.Example 4.3 Suppose there is a community
Suppose that after three quizzes in a class, you have a mean of 75. If you get 92 in the next quiz, what would your new average be?
Using daily inmate data from the Orleans Parish Prison in New Orleans, from 2011 until mid 2017, it can be found that the average daily inmates was 2 181.69.a) Is the number provided a parameter or a
Say you work for a government agency that has sample median income of residents in Houston for every year from 1920 to 2018, with the exception of the year 1980 which is missing. A supervisor
Using the following data,show thata) s2 = 8.48.b) s = 2.91. 9.71 4.25 3.75 9.42 8.33 7.21 2.55
The number of tourist (in millions) visiting New Orleans from 2006 to 2014 was 3.7, 7.1, 7.6, 7.5, 8.3, 8.8, 9, 9.3, 9.5, respectively. Does it make sense to take the average number of tourists here?
A professor of a business school course has been struggling to motivate students to put some effort into the course. Frustrated, he offers them a 5 point bonus in the Final exam if they all attend a
Find the variance and standard deviation for the following sample:123, 101, 171, 154, 168, 188, 203
Find the variance and standard deviation for the following sample:4.23, 1.75, 13.92, 9.65, 7.38
Show that in Example 4.6, the mean number of texts from men is 3.8, while the standard deviation is 2.77.Example 4.6 A while back, right at the beginning of a class, students were asked how many text
Based on samples of residents in Barnstable County, Massachussetts from 2009 to 2014, the mean travel times to work in 15 towns area) What is the average travel time to work for residents of
Have you ever wondered what is the typical weight of a meteorite landing on Earth? Physicists will tell you that it is best to consider the mass of the meteorite, not the weight, because the mass
The starting monthly salary for a marketing job from 10 randomly sampled people straight out of school was (in $)Find Q1,Q2,Q3. 3333 3553 3961 3480 3715 3520 3490 3500 3425 3375
For a specific data set, you know the median is 22. You use a computer to find the 30th percentile for the same data and find it to be 47. Explain how you know there must be a mistake in the
You are given the following information on miles per gallon (mpg), based on samples collected from two car models: Model A and Model BModel A: Five-number summary = (30, 34.125, 34.75, 35.87, 38)Mean

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