中位数数学 mean median mode_图文.ppt
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Mean, Median, Mode Range
By Monica Yuskaitis
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Vocabulary Review
Sum – the answer to an addition problem.
Addend – the numbers you added together to get the sum.
6 + 9 = 15
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Definition
Mean
Means
Average
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Definition
Mean – the average of a group of numbers.
2, 5, 2, 1, 5
Mean = 3
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Mean is found by evening out the numbers
2, 5, 2, 1, 5
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Mean is found by evening out the numbers
2, 5, 2, 1, 5
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Mean is found by evening out the numbers
2, 5, 2, 1, 5
mean = 3
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How to Find the Mean of a Group of Numbers
Step 1 – Add all the numbers.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
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How to Find the Mean of a Group of Numbers
Step 2 – Divide the sum by the number of addends.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
How many addends are there?
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How to Find the Mean of a Group of Numbers
Step 2 – Divide the sum by the number of addends.
6)
96
sum
# of addends
1
6
3
6
6
6
3
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How to Find the Mean of a Group of Numbers
The mean or average of these numbers is 16.
8, 10, 12, 18, 22, 26
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What is the mean of these numbers?
7, 10, 16
11
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