Statistical Sciences 2035 Chapter Notes - Chapter 2: Central Tendency, Pareto Chart, Standard Deviation

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Graphical methods: methods of depicting data sets to study relationships between different variables. The leaves should be single digit numbers (rounded values if originally more than one): rearrange the leaves so that they are in increasing order from left to right. Number of classes should be the smallest whole number k" that makes the quantity 2k greater than the number of measurements: find the class length, form non-overlapping classes of equal width. Lower boundary of the 1st class: smallest data value. Lower boundary of 2nd+ classes: upper boundary of the last class. Upper boundary of any classes: lower boundary of class + class length. The last class may be an open class, with no upper boundary: tally and count the number of measurements in each class. Frequency: the number of measurements in each class. Relative frequency (percent): proportion of the total number of measurements in the class.

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