MATH 1P98 Lecture Notes - Lecture 18: Frequency Distribution

• School: Brock University
• Department: Mathematics and Statistics
• Course: MATH 1P98
• Professor: Mark Willoughby

Document Summary

Measure of centre: a value at the centre or middle of data set. Mean: the measure of centre found by adding all of the data values and dividing the total by the number of data values. Resistant: the presence of extreme outliers doesn"t cause it to change very much. X with the bar at the top: is the mean of a set of sample values o o. Median: the measure of centre that is the middle value when the original data values are arranged in order of increasing or decreasing magnitude. Properties of the medic\an: doesn"t change by large amounts when we include just a few extreme values, so it is resistant measure of centre, does not directly use every data value. Mode: the values that occur with the greatest frequency. Properties of mode: can be found with qualitative data, a data set can have no ode or one mode or multiple modes.