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Descriptive statistic
describes consists of methods for organizing and summarizing info.
Inferential statistic
Infers consists of methods for drawing conclusions abt a population based on a sample.
Quantitative data
Numerical
Qualitative data
Attributes
Discrete examples
Number of desks in a room
Continuous examples
Temperature
How to find relative Frequency
Divide the frequency of a class by the total # of observations
3 Standard Deviations Rules that almost all of the data lies
-3 and +3
75% of the data lies between
-2 and +2
IQR
Q3 - Q1
Lower Fence
Q1 -1.5(IQR)=
Upper Fence
Q3 +1.5(IQR)=
Natural Number
counting numbers
Integer
In a Set (-3,-2,-1,0,1,2,3)
Rational Number
Real numbers that can be expressed as the ratio of two integers
All integers are #
Can be expressed as decimals which either end or repeat a sequence of digits
Ex: 3=3/1
Irrational Number
Real Number are Not rational numbers
cannot be expressed as a ratio of two integers
have decimal representation which DOES NOT end and repeat a sequence of digits
Ex: 0.01001000100001….