Working With Data
- Why should I learn this?
Many items in today's world are the direct results of advanced research from surveys. Explain to students that even the size of a soup can has been researched with the same methods they have learned about. The Nielsen ratings for television use similar strategies to find the most popular (mode) television shows and to force other shows into retirement. Lead children to understand that companies frequently use statistical research methods to prove that their product will become a best seller.
- How can I find the mode from a graph or line plot?
Help children understand that the heights of the bars in a bar graph or the heights of the marks in a line plot correspond to the number of items in that category. The mode can be found by looking for the bar or mark with the greatest height. It represents the most frequently occurring choice.
- How do I make a bar graph from a tally chart?
Draw a tally chart and a grid for a bar graph on the board . For each tally, mark one box on the bar graph. Explain that the number of tallies corresponds to the number of boxes filled in on the bar graph. Then have children volunteer a title and labels for the graph. Have other volunteers explain their methods for creating bar graphs.
Keeping Track and
Range and Mode: