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combination

a selection of items in which order is not important

Fundament Counting Principle

a method of using multiplication to count

n factorial

n! = n(n-1) * ...* 3 * 2 * 1

Permutation

possible outcomes when position is important; ie 24 people run a race, how many outcomes are their for 1sr, 2nd, and 3rd place

probability

is measured between 0 and 1

experimental probability

What the outcomes did turn out to be in an experiment.

sample space

is the set of all possible outcomes

Theoretical Probability

What the outcomes were supposed to be theoretically.

dependent events

when one events effects the outcome of another event (without replacement)

mutually exclusive events

events that cannot happen at the same time

independent events

when one event does not effect the other

Not Mutually Exclusive Event

Two events that can happen at the same time

Bimodal

2 modes

Range of a set of data

The difference between the greatest and least values

box-and- whisker plot

a graphic way to display the median, quartiles, and extremes of a data set on a number line to show the distribution of the data

Mean

the sum of all the values divided by the number of values

interquartile range

the difference between the first and third quartiles

Percentile

The # that falls above i% of the data.

Measure of Central Tendency

Indicates the "middle" of the data set. The mean, median, and mode are the most common.

outlier

a data value that is either much greater or much less than the median

quartile

the lower of this is the value with a quarter of the data below it; the upper of this has a quarter of the data above it

Median

A segment or Ray that joins a vertex to the midpoint of the opposite side

Mode

the most common value

Essay

Research a career that uses statistics. Be prepared to tell me what the career is and what part of statistics they use.