MA 275 Lecture Notes - Lecture 1: Frequency Distribution, Histogram
29 Aug 2016
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Document Summary
The items you collect come in as raw data and form a distribution of data. Frequency distribution the organization of raw data in table form using classes and their frequencies. Histogram and frequency polygon graphic displays of a frequency distribution. Grouped frequency distribution the range of the data is large, the data is grouped in classes. Percentage frequency distributions find percentage of values in each class: Relative frequency distributions the decimal of a percent is called relative frequency. Possible exception of the first and last class: group/class boundaries never overlap, class limits should have the same decimal place value as the data, class boundaries should have one additional place value and end in a. 5: round up the class width to get the desirable endpoints, each data item must fall into exactly one group/class, group/class midpoint.
