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7 Cards in this Set
- Front
- Back
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Grouped Data |
frequency distribution |
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Weighted Mean |
a variable is found by multiplying each value of the variable by its corresponding weight, adding these products, and dividing this sum by the sum of the weights.
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Modal Class |
of a variable can be obtained from data in a frequency distribution by determining the class that has the largest frequency. |
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Z-Score |
represent the distance that a data value is from the mean in terms of the number of standard deviation. unitless. it has mean 0 and standard deviation 1. s
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kth percentile |
Pk, a set of data is a value such that k percent of the observation are less than or equal to the value. |
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Quartiles |
divides data sets into fourths or four equal part |
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Interquartile Ranges , IQR |
the range of the middle 50% of the observations in a data set. the difference between the 3rd and 1st. |
