10 CHAPTER1 Picturing Distributions with Graphs APPLY YOUR KNOWLEDGE The color o

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10 CHAPTER1 Picturing Distributions with Graphs APPLY YOUR KNOWLEDGE The color of your car. are choosing "neutral" colors (silver, white, black). Here is the distribution of the most popular colors for 2005 model luxury cars made in North America 1.3 News from the auto color front: fewer luxury car buyens Color 20 18 16 White, pearl Blue Light brown Red Yellow, gold 10 (a) What percent of vehicles are some other color (b) Make a bar graph of the color data. Would it be correct to make a pie chart if you added an "Other" category? Never on Sunday? the days of the week. Here are the average numbers of babies born on each day of the week in 2003: 1.4 Births are not, as you might think, evenly distributed across Day Births 7,563 11,733 13,001 12,598 12,514 12.396 8,605 Present these data in a well-labeled bar graph. Would it also be correct to make a pie chart? Suggest some possible reasons why there are fewer births on weekends Do the data tell you what you want to know? a Web site for downloading MP3 music files, you want to know what percent of owners of portable MP3 players are 18 to 24 years old. The data in Example 1.3 do not tell you what you want to know. Why not? 1.5 To help you plan advertising for Quantitative variables: histograms Quantitative variables often take many values. The distribution tells us what val- ues the variable takes and how often it takes these values. A graph of the distribu tion is clearer if nearby values are grouped together. The most common graph of the distribution of one quantitative variable is a histogram. histogram

Explanation / Answer

1.3)a) Other vehicle color percentage= 100-(20+18+16+13+10+7+6) = 100-90 = 10%

b)

1.4)

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