Презентация на тему «Using Online Video Examples in Introductory Business 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

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

Class example day Teach by example Work all homework problems in class Get creative

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Why Videos

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

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

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

Elmo DT-150AF PAL Desktop Presenter Portable (1.9 kg) Zoom capability Remote Control $

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Media Converter

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

Captures activity on screen Used to capture Excel and PowerPoint $69

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Equipment

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

A simple “work by hand” problem Concept problems Incorporating PowerPoint slides Incorporating Excel

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Typical Problem & Solution

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

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. 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.

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More Examples

Using Snap Z Pro to capture manipulations on Excel Concept question with PowerPoint

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Going Further

Assessment of student attitudes Creating a CD of examples that students can purchase with their textbooks Virtual Guest Lecturers

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