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© 2014 Pacific Crest
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A
Successful Performance
Successful application of your learning looks like this
As you begin to apply what you’ve learned, you should have a good idea of what success looks like.
A SUCCESSFUL
PERFORMANCE
I interpret and evaluate a data analysis presentation based on its central tendency. I...
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Select the most effective measures
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Perform high-quality analysis
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Produce meaning and critical implications
I present an analysis of a set data showing the central tendency. I...
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Use graphics effectively
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Use the measure of central tendency appropriately
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Explain graphs and statistics effectively
D
emonstrate Your Understanding
Apply it and show you know in context!
1. Create a set of data where the mean is much lower than the median. What does this tell you about
your distribution?
2. Examine the data available at online and find the mean and median heights for right and left-handed
people. Are the results as you expected?
3. Using the data available online, construct a bar graph for nominal data and define the relevant mode.
4. Imagine you have a set of college grade point averages for students graduating from an honors
program. What would your predicted values for the mean, median, and mode be?
H
ardest Problem
How hard
can
it be? Can you still use what you’ve learned?
Based on the Models, the Methodologies, and the Demonstrate Your Understanding (DYU) problems in
this activity, create the
hardest
problem you can. Start with the hardest DYU problem in this experience
and by contrasting and comparing it with the other DYU problems, play “What if” with the different
conditions and parameters in the various problems.
Can you still solve the problem? If so, solve it. If not, explain why not.
What are the conditions and parameters that make a problem where you must identify and measure central
tendency a difficult problem to solve?
T
roubleshooting
Find the error and correct it!
What is the normal length of time it takes for a woman to conceive?
The length of time for a woman
to conceive (if that is her intention) is different than for a woman who is trying
not
to conceive. The
average (mean) amount of time is 7.5 months for women who want to conceive. But 50% of women
trying to conceive will be pregnant within 4 months (this is the median). Therefore, we can expect that
a woman will have to wait for almost 8 months to determine if she can conceive.
7.1 Central Tendency