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business
principles of managerial statistics

Questions and Answers of Principles Of Managerial Statistics

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
The 25th percentile for waiting time at a bank is 3 minutes. The 75th percentile is 17 minutes. Find the interquartile range.
You are given the following five-number summary for a sample: 2, 13, 22, 31,50. Find the IQR.
For the following data: 3, 4, 9, 11, 12, 17, 27, 29a) Find the five-number summary.b) Calculate the IQR.
It is possible for a variable in a data set to be neither numerical nor categorical. One way this happens is that the instrument available to measure the variable can only reach a certain value, and
Some studies suggest that bilingual children are better at problem solving than non-bilingual children. According to Figure 4.12, there is no evidence that students at bilingual service schools
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
In the observations below, any value that is “A summary of these type of data sets can still be useful.a) Replace all 1 using the formula in this section.b) Why is the Q1 calculation not
In the two scatterplots below, state whether r has a small, medium, or large value, and interpret what is seen in the scatterplot. (a) o 00 00 O 0%² 8 00€ 300 o opood 00 Focomob o wis
In Toronto, Canada residents can pick up and drop off a water sample kit at one of six Toronto Public Health locations to sample tap water for lead. Download “leadsampling_2016”. The file has the
Recall that Figure 3.19 drew scatterplots of cheese fat percentage and moisture percentage using data from Canada, while also considering the type of cheese and adding a trend line. Below are the
In their 2017 book Teaching Statistics: A Bag of Tricks, Andrew Gelman and Deborah Nolan provide a series of ideas for active student participation. In one of the activities, while taking an exam,
The file “VitalSignsBaltimore15wdictionarytoprows” includes an affordability index for mortgages, affordm15, and for rent, affordr15, for 55 communities in Baltimore.a) Construct a scatterplot of
Below are the yearly number of trees planted or funded by Seattle city programs from 2007 until 2016.a) Find the mean number of trees.b) Find the median number of trees. 1707 2345 2686 2187 1900 3258
The file “VitalSignsBaltimore15wdictionarytoprows” includes an affordability index for mortgages, affordm15, for 55 communities in Baltimore.a) Find the mean of the index.b) Find the median of
University professors are evaluated by their students during each school term. The student survey answers can be turned into scores. In one question, students grade the performance of the professor.
A city manager has been given parking lot availability data. The data set provides parking spaces available every five minutes at parking lots (of all sizes, from small to very large) throughout the
According to a recent report, in Northern Ireland, of 21 982 people previously found guilty of a crime, 4059 reoffended during a one-year observational period. What is the proportion of reoffenders?
One of the PewResearchCenter’s survey topics is mobile phone use. The file “Riverside_Smartphone_Dependency” summarizes the proportion of respondents who are smartphone dependent (use
2014 housing market data from37 ZIP Codes in Austin, Texas, is available online. Using the data file “2014_Housing_Market_Analysis_Data_by_ Zip_Code,” and with the assistance of statistical
Sketch a scatterplot for whicha) r = 1;b) r = 0, with no association between the two variables; andc) r = 0, with strong association between the two variables.
If there are X1,X2,…,Xn observations, the geometric mean, an alternative measure of centrality, isFor example, beach water quality is frequently assessed through the geometric mean. Below are water
The Canadian Dairy Information Centre compiles information from several companies on the cheeses made from cow, goat, sheep, and buffalo milk. A random sample of 10 observations of moisture percent
For a specific data set, Q1 = 250 and Q3 = 250. What is the value of the median?
A production team must purchase a computer with some given specifications (processor speed, memory size, etc.), and a 25-inch monitor. Computers have a mean cost of $3000, with a standard deviation
True or Falsea) Approximately half of the data falls inside the box of a boxplot.b) Large data sets tend to have smaller boxes in a boxplot.c) A boxplot will always tell you what the mean of the data
The following is the five-number summary of the traffic accidents last year in several intersections in a city.36.00, 45.00, 54.00, 70.00, 108.00What is the MOST appropriate statement that can be
You are given the following five-number summary for a sample 2, 13, 22, 31, 50What is the LEAST appropriate statement that can be made?a) The standard deviation of the sample is 18.26b) The
The third quartile for SAT math scores for region X was 652. What is the MOST appropriate statement that can be made?a) A third of test takers got a score of 652 or less.b) 25% of test takers got a
In a Washington Post article titled “A minimum-wage worker can’t afford a two-bedroom apartment anywhere in the U.S.” (June 13, 2018), it was highlighted how “… there is still nowhere in
2010 median house value by census group in Houston is available in the file “Median_House_Value.”a) Get the minimum, median, mean, and maximum values. What iswrong with the minimum and how do you
Download the file “Air_Traffic_Landings_Statistics” with data on Air traffic landings for San Francisco.a) The mean Total Landed Weight, is it a statistic or a parameter?b) What is the mean Total
In September 2018, Google launched a beta version of a search tool for data. Go to https://toolbox.google.com/datasetsearch, and enter domestic violence statistics. Download in CSV form one of the
A political candidate wants to know what are her chances of being elected in the coming elections. Her team takes a random sample of 2500 registered voters and ask them who they will vote for. Will
In Case Study 1, it was stated that “It was verified that the number of students that dropped the course or stopped attending class for both groups were similar. ”Why do you think it is necessary
In September 20, 2017, Puerto Rico was struck by Hurricane Maria, a powerful storm with 155 mph sustained winds. In May 2018, multiple media outlets reported the findings of a study5 in which

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