Using Calculator: SHIFT, MODE/SET UP, 3, 1, MODE, 2(stat), 1(var), enter data Mean: AC, SHIFT, 1, 4, 2 Standard deviation 9 : AC, SHIFT, 1, 4, 3 Median: middle observation Mode: most frequently occurring value Range: +*.:-$0 − $&*++-$0 Stem-and-Leaf plots à stem (left) & leaf (right)
Frequency distribution 1. Number of classes or bins (=)
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2. Each interval . = K 3. Round . up to whole number 4. Create = number of bins of values with . intervals Cumulative frequency
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Related frequency =
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Histogram
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Interquartile range XUY = UW − U7 Outliers of a Data Set Lower Threshold Value (LT) Z[ = U7 − 1.5×XUY Upper Threshold Value (UT) `[ = UW − 1.5×XUY Boxplot
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General Formula: Sample Variance
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Calculation: Sample Variance
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Sample Mean
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Coefficient of Variation (CV): the ratio of the standard deviation to the mean
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Grouped Data
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Chapter 2
Ordinate diagram Bar plot – same as a histogram but the columns aren’t joined Five number Summary à &121&%&, U7 , ! = UV , UW , &*!1&%& Quartiles of a Data set