Representing Data Using Frequency Graphs

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Presentation transcript:

Representing Data Using Frequency Graphs Projector Resources

Bar Graphs Eleven students take a test. The test is out of 10. All students scored more than 5. At least one student scored each mark between 6 and 10. The mode is 9 out of 10. Sketch on the Drawing Graphs handout two bar graphs that could represent the results of the test. On the first graph make sure the median is equal to the mode. On the second graph make sure the median is different from the mode.

Mode and Median

Discrete Representation

Discrete and Continuous Representations Frequency Bar Graph Frequency Line Graph

Continuous Representation

Matching Cards Take turns at matching pairs of cards that you think belong together. Each time you do this, explain your thinking clearly and carefully. Your partner should either explain that reasoning again in his or her own words, or challenge the reasons you gave. Write your reasons for the match on the poster. You both need to be able to agree on and explain the placement of every card. You may find some of ‘Word’ cards match two graphs. This problem will be resolved as you match more cards. Be prepared to change your mind about the matches.

Sharing Posters If you are staying at your desk, be ready to explain the reasons for your group’s matches. If you are visiting another group: Copy your matches onto a piece of paper. Go to another group's desk and check to see which matches are different from your own. If there are differences, ask for an explanation. If you still don’t agree, explain your own thinking. When you return to your own desk, you need to consider as a group whether to make any changes to your poster