Learning Goal  You will understand and use the math vocabulary of chapter 2 to solve problems.

Mean  The sum of the data divided by the number of data items  Examples 7, 7, 3, 2, 6 Step 1 (add numbers together) = 25 Step 2 (divide added amount by the amount of numbers you added) 25/5 = 5 You will understand and use the math vocabulary of chapter 2 to solve problems. 2-1

Outlier  Data item that is much greater or less than the other data items  Examples 7, 6, 7, 8, 25 The outlier will change a mean to be greater or lower You will understand and use the math vocabulary of chapter 2 to solve problems. 2-1

Median  Is the middle number in a set of ordered data  Examples 4, 5, 1, 6, 2 Step 1 (put the numbers in order) 1, 2, 4, 5, 6 Step 2 (cross off numbers until you find the middle one) 1, 2, 4, 5, 6 You will understand and use the math vocabulary of chapter 2 to solve problems. 2-2

Mode  The data item that appears most often  Examples 4, 4, 5, 6, 7, 1, 0 Find which number appears most often = 4 You will understand and use the math vocabulary of chapter 2 to solve problems. 2-2

Frequency Table  Is a table that lists each item in a data set with the number of times the item occurs  Examples You will understand and use the math vocabulary of chapter 2 to solve problems. 2-3

Range  Difference (-) between the least and greatest  Example 22, 3, 21, 12, 14 Step 1 (find the highest number in the data) 22 Step 2 (find the lowest number in the data) 3 Step 3 (Subtract lowest from highest) 22-3 = You will understand and use the math vocabulary of chapter 2 to solve problems.

Line Plot  A graph that shows the shape of a data set by stacking X’s above each data value on a number line  Examples You will understand and use the math vocabulary of chapter 2 to solve problems. 2-3

Bar Graph  Use vertical or horizontal bars to show comparisons  Examples You will understand and use the math vocabulary of chapter 2 to solve problems. 2-4 Title Equal width, but bar heights will vary Label

Line Graph  Uses a series of line segments to show changes in data  Examples 2-4 You will understand and use the math vocabulary of chapter 2 to solve problems. Title Label

What is this? Line Plot Line Graph Bar Graph Frequency Table TYPE of Graph?

Spreadsheet  Is a table made up of rows and columns used to organize data  Examples 2-5 You will understand and use the math vocabulary of chapter 2 to solve problems. Rows Columns

Cell  Is a box in a spreadsheet where a specific row and column meet  Example 2-5 You will understand and use the math vocabulary of chapter 2 to solve problems. Cell

Stem-and-Leaf Plots  Is a graph that uses the digits of each number to show the shape of the data  Examples You will understand and use the math vocabulary of chapter 2 to solve problems. 2-6

Misleading Graphs  Present data in ways to influence you  Examples You will understand and use the math vocabulary of chapter 2 to solve problems. 2-7 Using different pictures for bars Not explaining the numbers