Data management

Graphs

Bar graphs

A bar graph is used to compare data

Picto graph

A picto graph uses pictures to compare data

Line graph

A line graph is used to show change over time

Scatter plot

A scatter plot shows the type of relationship that exists between two sets of data

Circle graph

A circle graph represents data in a percentage or in a whole

Stem and leaf plot

A stem and leaf plot orders data by using place values

Double bar graph

A double bar graph uses data to compare two sets of data

Line plot

A line plot shows numbers on a data line and shows frequency

Mean

The mean is the sum of a set of numbers divided by the number of numbers in the set. (The average)

Ex. 10+3+5+8+2=28÷6=4.6

Median

The median is the middle number when the data is arranged in a numerical order.

Ex. 1,5,6,7,7,8,9=7 is the median

Mode

The mode is the number that occurs the most often in a set of numbers.

Ex. 1,1,2,3,3,5,6,6,6,6,7,7,7,8=6 is the mode

Range

The range is the difference between the greatest and least numbers in a set of data or the lowest to highest number.

Ex. 1,3,6,5,9,7,2= 1) 9-1=8 2) 1-9