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2 cards from this section. Quick, good the night before a test.
What is the arithmetic mean of the following values: 5, 10, 15?
Sum all the values and divide by the count.
Given observations are 12, 15, 20, calculate the mean.
Add the numbers and divide by how many there are.
What is the formula for arithmetic mean?
Think about how averages are typically found!
True or False: The arithmetic mean can be significantly affected by extreme values.
Consider examples where large numbers skew averages.
Suppose the scores from a completed math test are: 78, 85, 91, 76, and 88. If a new score of 95 is added, how does it affect the mean?
How do you think a higher score affects the average?
You have the incomes of several households ranging from 2000 to 5000. One household earns 15000. Discuss the potential impact of this outlier on the arithmetic mean.
Consider why extreme values skew average results.
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