Practice Problems (pdf)
Mean (the average)
Median
Middle value when items are arranged from least to greatest
Range
The difference between the max value and min value
Mode
Value that occurs the most in a set
Standard Deviation
Shows how spread data points are.
Low standard deviation: data points are closer to the mean
High standard deviation: data is spread over a wider range
Probability of an Event
Joint or conditional probability
Mutually exclusive probability
Fundamental Counting Principle
Pick 1 from each group, multiply the number of options in each group
Permutation
A combination of events occurring when order matters and the items cannot be repeated
Combination
A combination of events occurring when the order does NOT matter
