Finite Math Examples

Find the Variance 56 , 38 , 60 , 30 , 40 , 42 , 37 , 76 , 39 , 53 , 45 , 36 , 62 , 43 , 51 , 32 , 42 , 54 , 52 , 37 , 38 , 32 , 45 , 60 , 46 , 40 , 36 , 47 , 29 , 43 , 37 , 38 , 45 , 50 , 48 , 60
, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
Step 2
Simplify the numerator.
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Step 2.1
Add and .
Step 2.2
Add and .
Step 2.3
Add and .
Step 2.4
Add and .
Step 2.5
Add and .
Step 2.6
Add and .
Step 2.7
Add and .
Step 2.8
Add and .
Step 2.9
Add and .
Step 2.10
Add and .
Step 2.11
Add and .
Step 2.12
Add and .
Step 2.13
Add and .
Step 2.14
Add and .
Step 2.15
Add and .
Step 2.16
Add and .
Step 2.17
Add and .
Step 2.18
Add and .
Step 2.19
Add and .
Step 2.20
Add and .
Step 2.21
Add and .
Step 2.22
Add and .
Step 2.23
Add and .
Step 2.24
Add and .
Step 2.25
Add and .
Step 2.26
Add and .
Step 2.27
Add and .
Step 2.28
Add and .
Step 2.29
Add and .
Step 2.30
Add and .
Step 2.31
Add and .
Step 2.32
Add and .
Step 2.33
Add and .
Step 2.34
Add and .
Step 2.35
Add and .
Step 3
Divide.
Step 4
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.
Step 5
Set up the formula for variance. The variance of a set of values is a measure of the spread of its values.
Step 6
Set up the formula for variance for this set of numbers.
Step 7
Simplify the result.
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Step 7.1
Simplify the numerator.
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Step 7.1.1
Subtract from .
Step 7.1.2
Raise to the power of .
Step 7.1.3
Subtract from .
Step 7.1.4
Raise to the power of .
Step 7.1.5
Subtract from .
Step 7.1.6
Raise to the power of .
Step 7.1.7
Subtract from .
Step 7.1.8
Raise to the power of .
Step 7.1.9
Subtract from .
Step 7.1.10
Raise to the power of .
Step 7.1.11
Subtract from .
Step 7.1.12
Raise to the power of .
Step 7.1.13
Subtract from .
Step 7.1.14
Raise to the power of .
Step 7.1.15
Subtract from .
Step 7.1.16
Raise to the power of .
Step 7.1.17
Subtract from .
Step 7.1.18
Raise to the power of .
Step 7.1.19
Subtract from .
Step 7.1.20
Raise to the power of .
Step 7.1.21
Subtract from .
Step 7.1.22
Raising to any positive power yields .
Step 7.1.23
Subtract from .
Step 7.1.24
Raise to the power of .
Step 7.1.25
Subtract from .
Step 7.1.26
Raise to the power of .
Step 7.1.27
Subtract from .
Step 7.1.28
Raise to the power of .
Step 7.1.29
Subtract from .
Step 7.1.30
Raise to the power of .
Step 7.1.31
Subtract from .
Step 7.1.32
Raise to the power of .
Step 7.1.33
Subtract from .
Step 7.1.34
Raise to the power of .
Step 7.1.35
Subtract from .
Step 7.1.36
Raise to the power of .
Step 7.1.37
Subtract from .
Step 7.1.38
Raise to the power of .
Step 7.1.39
Subtract from .
Step 7.1.40
Raise to the power of .
Step 7.1.41
Subtract from .
Step 7.1.42
Raise to the power of .
Step 7.1.43
Subtract from .
Step 7.1.44
Raise to the power of .
Step 7.1.45
Subtract from .
Step 7.1.46
Raising to any positive power yields .
Step 7.1.47
Subtract from .
Step 7.1.48
Raise to the power of .
Step 7.1.49
Subtract from .
Step 7.1.50
One to any power is one.
Step 7.1.51
Subtract from .
Step 7.1.52
Raise to the power of .
Step 7.1.53
Subtract from .
Step 7.1.54
Raise to the power of .
Step 7.1.55
Subtract from .
Step 7.1.56
Raise to the power of .
Step 7.1.57
Subtract from .
Step 7.1.58
Raise to the power of .
Step 7.1.59
Subtract from .
Step 7.1.60
Raise to the power of .
Step 7.1.61
Subtract from .
Step 7.1.62
Raise to the power of .
Step 7.1.63
Subtract from .
Step 7.1.64
Raise to the power of .
Step 7.1.65
Subtract from .
Step 7.1.66
Raising to any positive power yields .
Step 7.1.67
Subtract from .
Step 7.1.68
Raise to the power of .
Step 7.1.69
Subtract from .
Step 7.1.70
Raise to the power of .
Step 7.1.71
Subtract from .
Step 7.1.72
Raise to the power of .
Step 7.1.73
Add and .
Step 7.1.74
Add and .
Step 7.1.75
Add and .
Step 7.1.76
Add and .
Step 7.1.77
Add and .
Step 7.1.78
Add and .
Step 7.1.79
Add and .
Step 7.1.80
Add and .
Step 7.1.81
Add and .
Step 7.1.82
Add and .
Step 7.1.83
Add and .
Step 7.1.84
Add and .
Step 7.1.85
Add and .
Step 7.1.86
Add and .
Step 7.1.87
Add and .
Step 7.1.88
Add and .
Step 7.1.89
Add and .
Step 7.1.90
Add and .
Step 7.1.91
Add and .
Step 7.1.92
Add and .
Step 7.1.93
Add and .
Step 7.1.94
Add and .
Step 7.1.95
Add and .
Step 7.1.96
Add and .
Step 7.1.97
Add and .
Step 7.1.98
Add and .
Step 7.1.99
Add and .
Step 7.1.100
Add and .
Step 7.1.101
Add and .
Step 7.1.102
Add and .
Step 7.1.103
Add and .
Step 7.1.104
Add and .
Step 7.1.105
Add and .
Step 7.1.106
Add and .
Step 7.1.107
Add and .
Step 7.2
Reduce the expression by cancelling the common factors.
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Step 7.2.1
Subtract from .
Step 7.2.2
Cancel the common factor of and .
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Step 7.2.2.1
Rewrite as .
Step 7.2.2.2
Cancel the common factors.
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Step 7.2.2.2.1
Rewrite as .
Step 7.2.2.2.2
Cancel the common factor.
Step 7.2.2.2.3
Rewrite the expression.
Step 8
Approximate the result.