Frequency Tables and Histograms

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Presentation transcript:

Frequency Tables and Histograms Common Core Math I Unit 2

Frequency Frequency is how often something occurs. Sam played football on Saturday morning Saturday afternoon Thursday afternoon The frequency was 2 on Saturday, 1 on Thursday and 3 for the whole week.

Frequency Distribution “values” and their frequency how often each “value” occurs

Newspapers Sold These are the numbers of newspapers sold at a local coffee shop over the last 10 days: 22, 20, 18, 23, 20, 25, 22, 20, 18, 20 We will count how many of each number there is. Newspapers Sold Frequency 18 2 19 20 4 21 22 23 1 24 25

Newspapers Sold Newspapers Sold Frequency 15-19 2 20-24 7 25-29 1

Histograms A histogram is a graphical display of data using bars of different heights. It is similar to a bar chart, but a histogram groups data (numbers) into ranges. And you decide what ranges to use! http://www.mathsisfun.com/data/histograms.html