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Study Guide 2.2-2.3

Frequency Distribution shows how a data set is partitioned among all of several categories(or classes)by listing all of the categories along with the number of data values in each of the categories
Lower class limits are the smallest numbers that can actually belong to different classes
Upper class limits are the largest numbers that can actually belong to different classes
Class boundaries are the numbers used to seperate classes, but without the gap created by class limits .5 1-2 2.5
class midpoints are the values in the middle of the classes that can be found by adding the lower class limit to the upper class limit and dividing the sum by two
class width is the difference between two consecutive lower class limits or twio consecutive lower class boundries 60-69 70-79 class width is 10
histogram basically a graphic version of a frquency distribution. horizontal scale: Use class boundries or class midpoints Vertical scale: use the class frequncies
Relative frequency distribution includes the same class limits as a frequency distribution, but the frequncy of a class is replaced with a relative frequncies( a proportion) or a percentage frequncy ( a percent)
cumulative frequncy It adds up like 60-69 has 5 so anything under 70 has 5 but 70-79 has 5 so anything under 80 is 10
Created by: jking009