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These slides will instruct you to learn about line plots and stem and leaf plots. Pay close attention and TAKE NOTES for the quizzes to come. What is a line plot? A line plot uses a number line and X's to show how often a value occurs in a data set. To set up a line plot: 1. put all of the numbers in order from least to greatest. 2. Then draw a number line that includes these values. 3. Place an X above the number on the number line that goes with the number. Here is the data: 25,0,10,10,15,25,20,15,15,0,10,15,15 This is an example of a line plot. 0 x x Which number has the most? Which number is the least? 5 10 x x x 15 x x x x x 20 x 25 x x A key must be written for every stem and leaf plot!!! A stem and leaf plot uses the digits of each number in a data set to group the individual numbers, usually in increasing or decreasing order. Each LEAF on the plot represents the right-hand digit, or ONES and the STEMS represent the left-hand digit, or the TENS. Example of Stem and Leaf. Minutes doing homework Key 3|2 means 32 minutes Stem 4 3 2 5 0,4,5,5 2 0,1,2,7,9 0,0,8 Leaf minutes working on Homework 58,20,41,40,25,25, 49,50,50,47,24,32,42 Data set Outlier is the numbers that are very big or very small compared to the other data. Range is the difference be largest number and smallest. Mode is the number that is the most. Median is the number in the middle when you put the data in order smallest to largest. |