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1. Check Figure 5 for each of the 8 items mentioned above. Does it meet all requirements? What amount does each unit represent?
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Use data from Figure 2 for exercises 2 through 4.
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2. For marijuana/hashish, cocaine, alcohol and cigarettes, draw a bar graph that shows the percent of seniors who ever used each of them.
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3. Make another bar graph showing for the same four drugs the percent of seniors who used each drug in the past year.
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4. Make another bar graph showing for the same four drugs the percent of seniors who used each drug in the past month.
Using the data in Figure 6, make a bar graph that shows the comparison of marijuana, alcohol and cigarettes (both one or more daily and half-pack or more) for each of the following.
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5. females and males
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6. college plans—none or under 4 yrs. and complete 4 yrs.
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7. the four regions
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8. population density. Large SMSA means large cities, other SMSA means not large cities, and non-SMSa means rural.
(figure available in print form)
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9. Make a bar graph showing the data you collected from exercise 6 in the section on Using Tables.
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10. Make a bar graph that uses the data in Figure 7 only for each year make two separate, adjacent bars to represent the data instead of using just one.
(figure available in print form)
(figure available in print form)
Information about change over a period of time is often best shown in a line graph. As shown in Figure 8, in one graph you can combine more than one kind of information. Notice that a point is used to represent each numerical fact, and line segments connect the points. A key is also necessary to tell the reader what each line represents.
Things to check when making a line graph.
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1. On the vertical axis, the left side, all units are the same width and each unit represents the same quantity.
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2. On the horizontal axis, line across bottom, arrange years or other items in an order that makes sense to you. Spacing must be equal.
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3. Plot points to represent each number fact. Connect points.
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4. Be sure graph has a title that can be easily understood and sides that are clearly labeled.
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5. Is it easy to read?
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6. Is it neat and attractive?
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7. Is a data source needed?