WEEK 1 LECTUREGM 533
APPLIED MANAGERIAL STATISTICS
Professor Brent Heard
Not to be copied or linked to without my permission
WEEK 1 LECTURE GM 533 Consider the following data on impulse items
bought at the checkout line of big box store and calculate the relative frequency for each scenario. Explain what relative frequency is and how you calculated it.
# of Impulse Items Purchased Frequency
0 Items 29
1 Item 7
2 Items 5
3 Items 4
4+ Items 2
WEEK 1 LECTURE GM 533 The following is a relative frequency distribution of lunch
preference on an Air Force base.
If this was the distribution of 11,600 people on the Air Force base, find the frequency for each lunch preference, explaining your calculation and then noting what you would do with the information if you were considering opening a restaurant just outside the Air Force base.
Lunch Preference Relative Frequency
Bring Lunch 0.27
Eat on base 0.37
Eat off base 0.31
Do not eat lunch 0.05
WEEK 1 LECTURE GM 533 A random sample of 10 engineers was asked
how much change in coins they had in their pockets on a given day. The responses were:
0.78 0.58 0.75 2.30 0 1.23 1.45 0.75 1.80 0.77
Find the mean, mode, median and midrange for this set of data. You may have to look midrange up, but it is also a measure of center. Compare the four and note how they relate.
WEEK 1 LECTURE GM 533 In order to stay in the honors program,
Mary needs to have at least a 90 average in her Geology class. She only has her final exam left which counts for 30% of her grade. She has had 7 graded assignments throughout the term and each of them counted 10% toward her final grade. Her 7 graded assignment scores were:
78 89 97 92 84 94 88 What does Mary need to make on her
final exam to have a 90 average?
WEEK 1 LECTURE GM 533 A company is tracking the amount of
sick leave employees use in a given year, they decided to use the legal department’s 11 employees as a sample. Their sick leave in hours/year for 2011 was the following:
32 40 0 16 48 12 14 24 26 30 38
Note the mean, variance and standard deviation for this set of data and explain how you might use this information in planning, budgeting, etc.
WEEK 1 LECTURE GM 533 A company is tracking the amount of sick leave
employees use in a given year, they decided to use the legal department’s 11 employees as a sample. Their sick leave in hours/year for 2011 was the following:
32 40 0 16 48 12 14 24 26 30 38 The company is considering giving bonuses to
employees who use 0 hours of sick leave (this may be illegal, this is only an example from a math guy). Find the z score for 0 sick leave hours and explain what percentage of employees would get a bonus based on this example. (We would have to assume this data is normally distributed.)
WEEK 1 LECTURE GM 533 A company is tracking the amount of sick
leave employees use in a given year, they decided to use the legal department’s 11 employees as a sample. Their sick leave in hours/year for 2011 was the following:32 40 0 16 48 12 14 24 26 30
38 Calculate the first, second, third quartiles
and interquartile range. Explain what each means and you might display the information in a presentation.
WEEK 1 LECTURE GM 533 The following table shows the average
bonuses per employee for an accounting firm from 2004 to 2011. Bonuses are given at the end of the calendar year.
WEEK 1 LECTURE GM 533Year Avg. Bonus
2004 $2,500
2005 $2,800
2006 $3,000
2007 $3,400
2008 $3,200
2009 $2,000
2010 $1,000
2011 $1,100
Determine the percentage change in the average bonuses from 2006 to 2010
WEEK 1 LECTURE GM 533 According to a recent survey of taxi cab
drivers in a major city, a driver spends an average of 8.7 hours a day in their cab. The standard deviation was calculated to be .72 hours and the distribution is approximately normal. Find the three intervals noted in the Empirical Rule and note what they are, how they are calculated and what they mean.
HISTOGRAMS WITH MINITAB Open your Excel File, in my example, we
will use Case 27 (House Data) Select all headers and data by doing a
click drag (Left click top left corner, hold down drag to bottom right corner)
See following chart
HISTOGRAMS WITH MINITAB Just capture headers and all data…
HISTOGRAMS WITH MINITAB Right click or Copy what you have
selected in Excel Go to a blank Minitab Project Worksheet
and put your cursor in the top left blank gray cell and paste
See following chart
HISTOGRAMS WITH MINITAB Click here and paste
HISTOGRAMS WITH MINITAB You will now have something like this…
HISTOGRAMS WITH MINITAB Now in Minitab, At the top, Click Graph, Choose “Histogram” Click “OK” for Simple Histogram You should see this
HISTOGRAMS WITH MINITAB We are doing a histogram on Age of Homes,
so double click “C8 Age” and it will appear in the Graph Variables box.
HISTOGRAMS WITH MINITAB I added a Title using the Label button, then I clicked “OK” Voila, you have it. Right Click, Copy Graph to put it
anywhere you wish
ABOUT MEI have worked in the NASA world since completing my graduate degree in 1987.
I earned both my M.S. and B.S. in Mathematics from Jacksonville State University in Jacksonville, Alabama. I did Post Graduate work in Mathematics and Engineering Management at the University of Alabama, Huntsville.
My teaching experience has included a number of colleges in Alabama and Virginia, as well as many years with DeVry. I am the live lecturer for all undergraduate and graduate statistics classes at DeVry.
In my spare time I enjoy writing. My genre is observational humor. In other words, I just enjoy finding humor in the world and making people laugh. My stories can be found in newspapers and at www.CranksMyTractor.com .
WEEK 1 LECTURE GM 533 In the next couple of days, I will post
these online at my “Statcave” site on Facebook.
You DO NOT have to be a Facebook person to see these, I simply post them there for convenience.
Website: www.facebook.com/statcave