Prob and Stats Unit 3 Vocab (3.1-3.4)

math

Frequency Table

Lists the elements in the sample space (the categories) and the frequency in which they occur

Pictograph

A graph that uses pictures to represent numerical information

Mode

The category or the element in the sample space that has the most data

Bar Graph

A graph where the frequency of each item in a sample space is represented by a rectangular bar

Pareto Graph

A bar graph where the bars are arranged in descending order

Circular Graph (Pie Graph)

A circular graph divided into wedges. Each wedge represents a portion a population or sample

Dot Plot

A graph where dots are stacked vertically to represent each data entries

Axis

Where your labels go

Stem and Leaf Plot

A graph that splits a number into two parts called a stem and a leaf

Split Stem and Leaf Plot Graph

The stem is listed twice when there is a large amount of data

Box Plot Graph

A graph that uses a box to signify the middle 50% of the data and lines extended from the box to represent the lower and upper 25% of data

Interquartile Range (IQR)

Measures the variance of a data set (the range of the box in your box plot)

Outlier

Odd one out

Histogram Graph

A bar graph with bars that are connected. The bars are connected because each bar represents groups of data

Variance

Like an average

Standard Deviation

The square root of the variance. More meaningful in finding the spread of the data

Chebyshev's Theorem

For any data set, population or sample, and for any constant, k, greater than 1, the proportion of the data that must lie within k, standard deviations on either side of the mean is at least 1-1/k².

Coefficient of Variation (CV)

A measure that is used when we do not know much about the data sets or when the data sets have different units of measure