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Normal Distribution
Normal Distribution:
Symmetric:
Mean = Median = Mode
50 %
50 %
Normal Distribution:
The area of the distribution
falling between the mean and a
value one standard deviation from
the mean is 34.13%
 = 30
=5
20
25
30
35
40
 = 30
=5
34.13%
20
25
34.13%
30
35
40
Normal Distribution:
13.59 % of the distribution lies
between a value that is one standard
deviation from the mean and the value
that is two standard deviations from
the mean.
 = 30
=5
20
25
30
35
40
 = 30
=5
13.59%
13.59%
20
25
30
35
40
Normal Distribution:
2.28% of the distribution lies beyond
a value that is two standard deviations
from the mean.
 = 30
=5
20
25
30
35
40
 = 30
=5
2.28 %
2.28 %
20
25
30
35
40
Normal Distribution
34.13%
34.13%
13.59%
13.59%
2.28%
2.28%
50%
50 %
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