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Statistics
Statistics 2- Descriptive
8
Archaeology
04/13/2010
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Term
What is the Mode?
 Definition
The number or value that occurs the most
Term
What is the Median?
 Definition
The mid point in a set of numbers of values
Term
What is the Mean and what is the formula?
 Definition
The average of all the values or numbers.
Mean = Total Observation/ Number of Observations
Term
What are the 3 forms of distribution?
 Definition
Symmetrical, Positive Skew and Negative Skew
Term
What is the Range?
 Definition
The difference between the highest and lowest value.
Term
What is a Quartile, Interquartile Range and Quartile Deviation?
 Definition
Quartile- Q1 (25%), Q2(50%), Q3(75%) variables
Interquarile Range- Q3- Q1
Quartile Deviation- (Q3-Q1)/ 2
Term
What are the Formulas that indentify Quartiles?
 Definition
(0.25(n+1))
(0.5(n+1))
(0.75(n+1))

n= total number of observation
Term
What is Standard Deviation?
 Definition
It is the root mean square (rms)deviation of the values from their aritmetic mean.