2. Measures of Central Tendency
Mean
Median
Mode
Range
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3. Mean:
The mean is the mathematical average of a set of
numbers.
The mean is commonly referred to as the “average.”
The mean is quick and easy to calculate.
The mean is used in a variety of ways and in almost
every industry.
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4. Calculate the Mean
What is the average
age of our class?
Ages: 11, 11, 13, 12,
12, 13, 12, 12, 12
Mean = sum of
ages/number of
students
Average age = 12
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5. Mean
A real world example
of the Mean is Par.
Par is the average
expected score in
Golf.
If a hole is a Par 4,
then the average
expected score is 4
strokes.
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6. Mean
Companies use the
mean age of their
consumers to
develop their
advertising.
Can you think of a
commercial that was
targeted towards
you?
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7. Mean
Can you think of
another example of
how the Mean
relates to the real
world?
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8. Median
The median is the
middle value of a set
of data.
Memorizing Tip:
remember that the
median is in the
middle of the road.
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9. Median
The median is used in
a variety of statistics.
For example the
median income in
Alabama is $38,111
(U.S. Census Bureau).
The median age in
Montgomery, AL is
33.7 years old (U.S.
Census Bureau).
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10. Median
Find the median for the set of data.
Data set: 2, 5, 6, 7, 1, 3, 0, 8, 4
Place in order from least to greatest and find the
middle number.
0, 1, 2, 3, 4, 5, 6, 7, 8
The median is equal to 4!
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11. Mode
The mode is the
most frequently
observed value in a
data set.
The most frequently
printed words in
English are: the, of,
and, a , and to
(www.duboislc.org).
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12. Mode
The most popular
baby names in 2006
were Jacob, Emily,
Michael, Emma,
Joshua and Madison
(Social Security
Administration).
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13. Mode
Find the mode for this set of data.
Data set: 2, 4, 3, 4, 3, 4, 4, 5, 4, 5, 5
The mode is 4, because it occurs the most times.
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14. Range
The range is the difference between the largest and
smallest values.
Range of age: Oldest – Youngest.
Range of height: Tallest – Shortest.
Range of speed: Fastest – Slowest.
Can you think of a use for the range?
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15. Range
Those below the age
of 5, or older than
50 should get
vaccinated for the
flu (www.cdc.gov).
What is the range of
age for those who
don’t need to be
vaccinated?
50-5=45
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16. Thank you for visit
www.futureprogramming.in
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