Transcript Using Online Video Examples in Introductory Statistics

Using Online Video Examples in
Introductory Business Statistics
Monnie McGee, Jing Cao, Lynne Stokes
Department of Statistical Science
Robert Skinner, Ian Aberle, and Steve Snider
Academic Computing Services, Office of the Provost
November 9, 2005
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
Current Implementation
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Headset microphone
Macintosh Computer
Snap Z Pro software
Digital Writing Tablet
Original Implementation
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Document camera (Elmo Desktop Presenter)
Sony Media Converter & audio mixer
iMovie software (free with mac)
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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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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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Recording the Videos
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A simple “work by hand” problem
Concept problems
Incorporating PowerPoint slides
Incorporating Excel
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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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