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Stats 48 notes page 4

# Stats 48 notes page 4 - Mode-the data value that occurs...

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The Ogive is constructed by plotting a point corresponding to the cumulative frequency, cumulative relative frequency, or cumulative percent frequency and each upper class limit. Because of the gaps that occur between adjacent classes, the midpoints of the upper limit of one class Median -the midpoint of a distribution; the number such that half the observations are smaller and the other half are larger. Calculating a Sample Median 1. Arrange the n data values from smallest to largest. 2. If n is odd, the median is the middle number. a. If n is even the median is the mean of the two middle numbers (mean=average)

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Unformatted text preview: Mode-the data value that occurs most frequently in the data set. Bimodal-2 modes Multimodal-more than 2 modes (no modes) Percentiles-values of the variable that divide a set of ranked data into 100 equal subsets; each set of data has 99 percentiles. The pth percentile separates approximately the left p% from the right (100-p)% of the ranked data. Measures of Spread-range-interquartile range-variance-standard deviation Range-the largest data value minus the smallest data value (range=High-Low) Sample variance-the average of the squared deviations from the mean...
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