Mean = The sum of the data divided by the number of items in the data set.

Median = The middle number in a set of data when the data are arranged in numerical order.

Mode = The number of numbers that occur the most often in a set of data.

Range = A description of how spread-out the data is. The difference between the largest # and the smallest # in the data. Central tendency = indicate the middle or center of a set of data.

Intervals = space between numbers on an axis. The space should be consistent.

Data set =simply a group of numbers.

Unit 9 Vocabulary (14 words)

Slide 1

Venn Diagram = A diagram that uses overlapping circles to show how elements among sets of numbers or objects are related.

Bar graph = A graphic form using bars to make comparisons of statistics.

Line plot =A diagram that shows the frequency of data.

Slide 2

Line graph = A type of statistical graph using lines to show how values change over a period of time.

Stem –and-leaf plot = A system used to condense a set of data where the greatest place value of the data forms the stem and the next greatest place value forms the leaves.

Circle graph = A type of statistical graph used to compare parts of a whole.

Slide 3

OUTLIER: a number or couple of numbers that lie away from the main cluster of numbers in a set of data. (An outlier affects the mean the most.)

EXAMPLE: Data: 100, 83, 91, 87, 0 ____ is the outlier.

Slide 4