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20 Cards in this Set
- Front
- Back
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The sum of the values divided by the number of values.
Sum of Values / Number of Values |
Mean
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The middle value of a data set when the values are arranged in order of size.
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Median
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The value or values that occur most frequently in a data set.
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Mode
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The difference between the highest and lowest values in a data set.
Highest Value − Lowest Value |
Range
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A statistical measurement that shows how data are spread above and below the mean. It is equal to the square root of the variance.
Square Root(Variance) |
Standard Deviation
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The difference between a value of a data set and the mean.
Data Value − Mean |
Deviation from the Mean
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A statistical measure that is the average of the squared deviations of data from the mean.
Sum of squared deviations / n−1 |
Variance
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A graph that uses horizontal or vertical bars to show how values compare to each other.
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Bar Graph
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Line segments that connect points on a graph to show the rising and falling trends of a data set.
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Line Graph
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A circle that is divided into parts to show how a whole quanitity is being divided. Each section represents a portion of the total amount.
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Circle Graph (Pie Chart)
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Find the Mean:
28, 19, 21, 26, 31 |
28 + 19 + 21 + 26 + 31 = 125
125 / 5 = 25 |
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Find the Median:
28, 19, 21, 26, 31 |
19, 21, 26, 28, 31
26 |
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Find the Mode:
86, 97, 86, 79, 92 |
86
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Find the Range:
28, 19, 21, 26, 31 |
31 − 19 = 12
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Find the Deviations from Mean:
28, 19, 21, 26, 31 |
Mean = 25
28 − 25 = 3 19 − 25 = -6 21 − 25 = -4 26 − 25 = 1 31 − 25 = 6 |
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Find the Standard Deviation if the variance is 24.5.
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√24.5 = 4.9
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One standard deviation above or below the mean equals:
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68.26%
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Which type of graph would you use if you had the following data: 64%, 17%, 15%, 4%
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Circle Graph (Pie Chart)
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Find the Mode:
56, 34, 49, 28, 62 |
No Mode
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Find the Median:
34, 28, 62, 56, 49, 51 |
28, 34, 49, 51, 56, 62
49 + 51 = 100 100 / 2 = 50 |
