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Mean, Median, ModeMean, Median, Mode
& Range& Range
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Defnition
MeanMean
MeansMeans
AverageAverage
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Defnition
•MeanMean – the average o agroup o numbers.
2, 5, 2, 1, 5
Mean = 3Mean = 3
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Ho to !ind the Mean o a"roup o #umbers
•$tep % – Add a the numbers.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
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Ho to !ind the Mean o a"roup o #umbers
•$tep ' – Divide the sum b(the number o addends.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96How many addends are there?
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Ho to !ind the Mean o a"roup o #umbers
•$tep ' – Divide the sum b(the number o addends.
6)96 sum# of addends1
636
6
63
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Ho to !ind the Mean o a"roup o #umbers
)he mean or average othese numbers is %*.
8, 10, 12, 18, 22, 26
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+hat is the mean o thesenumbers
7, 10, 16
11
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+hat is the mean o thesenumbers
2, 9, 1, 27
13
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+hat is the mean o thesenumbers
1, 2, 7, 11, 19
8
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+hat is the mean o thesenumbers
26, 33, 1, 52
38
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Defnition
MeMeddianian
is in theis in the
MiMiddddee
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Defnition
•MedianMedian – the midde numberin a set o ordered numbers.
1, 3, 7, 10, 13
Median = -Median = -
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Ho to !ind the Median ina "roup o #umbers
•$tep % – Arrange the numbersin order rom east to greatest.
21, 18, 2, 19, 27
18, 19, 21, 2, 27
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Ho to !ind the Median ina "roup o #umbers
•$tep ' – !ind the middenumber.
21, 18, 2, 19, 27
18, 19, 21, 2, 27
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Ho to !ind the Median ina "roup o #umbers
•$tep ' – !ind the middenumber.
18, 19, 21, 2, 27
!h"s "s your med"an numer$
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Ho to !ind the Median ina "roup o #umbers
•$tep 3 – there are to middenumbers, fnd the mean o these tonumbers.
18, 19, 21, 25, 27, 28
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Ho to !ind the Median ina "roup o #umbers
•$tep 3 – there are to middenumbers, fnd the mean o these tonumbers.
21+ 25 = 6
2) 623 med"an
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+hat is the median othese numbers
16, 10, 7
10
7, 10, 16
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+hat is the median othese numbers
29, 8, , 11, 19
11
, 8, 11, 19, 29
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+hat is the median othese numbers
31, 7, 2, 12, 1, 19
132, 7, 12, 1, 19, 31
12 + 1 = 26 2) 26
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+hat is the median othese numbers
53, 5, 81, 67, 25, 78
60
53 + 67 = 120 2) 120
5, 25, 53, 67, 78, 81
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Defnition
ModeMode
is the mostis the most
/opuar/opuar
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Defnition
•ModeMode – the number thatappears most re0uent(
in a set o numbers.1, 1, 3, 7, 10, 13
Mode = %Mode = %
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Ho to !ind the Mode in a"roup o #umbers
•$tep % – Arrange the numbersin order rom east to greatest.
21, 18, 2, 19, 18
18, 18, 19, 21, 2
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Ho to !ind the Mode in a"roup o #umbers
•$tep ' – !ind the numberthat is repeated the most.
21, 18, 2, 19, 18
18, 18, 19, 21, 2
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+hi1h number is themode
29, 8, , 8, 19
8
, 8, 8, 19, 29
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+hi1h number is themode
1, 2, 2, 9, 9, , 9, 10
9
1, 2, 2, , 9, 9, 9, 10
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+hi1h number is themode
22, 21, 27, 31, 21, 32
21
21, 21, 22, 27, 31, 32
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