Transcript Using Online Video Examples in Introductory Statistics

Using Online Video Examples in
Introductory Business Statistics
Monnie McGee
Assistant Professor, Department of Statistical Science
Robert Skinner, Ian Aberle, and Steve Snider
Academic Computing Services, Office of the Provost
Southern Methodist University
Outline
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Motivation
Static vs. Dynamic Examples
Equipment
Recording the Videos (live!)
More Example Videos
Going Further
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The Problem
“She never gave us enough examples on
how to work the homework problems”
“I fail to see how this course will ever be
useful to me in the future”
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Possible Solutions
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Class example day
Teach by example
Work all homework problems in class
Get creative
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Why Videos?
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Solutions posted on course website are
not dynamic
Important for students to see thought
processes involved in working the
problem
Digital video allows placement on the
course website
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Typical Problem and Solution
Employers may ask job applicants to take an IQ test if the test has
been shown to predict performance on the job. Score on one
test for the 20 to 34 age group are approximately Normally
distributed with mean of 110 and standard deviation of 25. Use
the Empirical Rule to answer the following questions:
a) About what percent of the people in this age group have
score above 110? Since 110 is the mean, and the mean is
equal to the median for a normal distribution, 50% of the people
in this group will have scores above the mean.
b) About what percent have scores above 160? 160 is 2
standard deviations from the mean. That means that there are
2.5% (5%/2) of the scores above the mean.
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Video Version
Equipment
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Document camera (Elmo Desktop Presenter)
Lavelier microphone
Macintosh Laptop Computer
Sony Media Converter & audio mixer
iMovie software (free with mac)
Snap Z Pro software
Apple Xserve and Quick Time Streaming Server
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To Stream or Not To Stream
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Streaming server allows play of the
video while it is still downloading
For on-campus connections, a regular
server is probably fine
Over a modem at a student’s home, the
videos would take all day to download.
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Document Camera
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Elmo DT-150AF PAL
Desktop Presenter
Portable (1.9 kg)
Zoom capability
Remote Control
$
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Media Converter
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Canopus ADVC-100
A/D Converter
Converts analog
video & audio to a
DV stream
Captured by
Firewire connection
$ 299
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Snap Z Pro Software
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Captures activity on screen
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Used to capture Excel and PowerPoint
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$69
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Equipment
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Document camera (Elmo Desktop Presenter)
Lavelier microphone
Macintosh Laptop Computer ($1200 iMAC)
Sony Media Converter & audio mixer
iMovie software (free with mac)
Snap Z Pro software
Apple Xserve and Quick Time Streaming
Server ($2000)
Autodesk Cleaner Software ($549)
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Recording the Videos
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A simple “work by hand” problem
Concept problems
Incorporating PowerPoint slides
Incorporating Excel
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Typical Problem & Solution
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Cause of death is an important issue for life insurance
companies; especially identifying the most likely causes of
deaths for various demographic subgroups of the population.
The number of deaths among persons aged 15 to 24 years in
the United States in 1997 due to the seven leading causes of
death for these age group were accidents, 12,958, homicide,
5793; suicide, 414; cancer 1583; heart disease, 1013;
congenital defects, 383; AIDS, 275.
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Solution
Number of Deaths, Persons Aged 15 to
24 (1997)
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Make a bar chart to display these
data. Your chart should look
something like this one, although
the order of the bars is not
important. It should be labeled
correctly and clearly.
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What additional information do
you need to make a pie chart?
We need to know the total number
of deaths in this age group in 1997.
We need that information to convert
the numbers into percentages to be
graphed into the pie chart.
14000
12000
10000
8000
6000
4000
2000
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AIDS
Congenital
Heart
Disease
Cancer
Suicide
Homicide
Accidents
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More Examples
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Using Snap Z Pro to capture
manipulations on Excel
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Concept question with PowerPoint
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Going Further
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Assessment of student attitudes
Creating a CD of examples that
students can purchase with their
textbooks
Virtual Guest Lecturers
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