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4 cards from this section. Quick, good the night before a test.
What is the mean of the following ungrouped data: 5, 10, 15?
Add all numbers together and divide by how many numbers there are.
Calculate the mean of these numbers: 20, 30, 40, 50.
Sum all numbers and divide by the number of observations.
What is the mean?
Think about it as a representative value of the numbers.
True or False: The mode is always the same as the mean.
Recall how each concept is defined.
A student collected the following test scores: 88, 94, 78, 85, 92. Calculate the mean.
Make sure to sum all the scores before dividing.
If the following grouped data represents age: 10-20(5), 21-30(10), and 31-40(15). Compute the mean age.
Remember to multiply midpoints by their frequencies.
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