Ch. 22 Key Terms

Question	Answer
Mean	Statistical term that is found by: Sum of all figures ÷ Number of figures
Weighted Mean	Used to find an average when values appear more than once
Median	Statistical term that represents the central point or midpoint of a series of numbers
Mode	Value that occurs most often in a series of numbers
Bar Graph	Visual representation using horizontal or vertical bars to make comparison or to show relationship on items of similar makeup
Line Graph	Graphical presentation that involves a time element. Shows trends, failures, backlogs, and the like
Circle Graph	A visual representation of the parts to the whole
Index numbers	Express the relative changes in a variable compared with some base, which is taken as 100
Price relative	The quotient of the current price divided by some previous year’s price—the base year—multiplied by 100
Measure of dispersion	Number that describes how the numbers of a set of data are spread out or dispersed
Range	Difference between the highest and lowest values in a group of values or set of data
Standard deviation	Measures the spread of data around the mean
Normal distribution	Data are spread symmetrically about the mean
Empirical Rule	For a normal distribution, nearly all the data fall within three standard deviations of the mean
Frequency distribution	Shows by table the number of times event(s) occurs

Resource summary

	Created by Brooke Young 11 months ago