This answer is approximate because these 35 actually

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35% of the test-takers had scores between 450 and 700. (This answer is approximate, because these 35% actually include the test-takers whose scores were exactly 450. The table does not provide enough information to permit us to answer this question precisely; despite that flaw, this phraseology is used on the CLAST).
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EXAMPLE 3.1.14 The table below gives an accurate portrayal of the distribution of humans according to IQ. IQ Percentile 135 99 119 90 115 84 104 60 100 50 92 30 87 20 80 10 76 4 1. What percent of humans have IQs greater than or equal to119? A. 90 B. 99 C. 9 D. 10 2. Approximately what percent of humans have IQs between 92 and 104? A. 30 B. 50 C. 20 D. 10 3. What percent of humans have IQs less than 87? A. 24 B. 20 C. 14 D. 10 WORLD WIDE WEB NOTE For practice involving percentile rank, visit the companion website and try THE PERCENTILATOR.
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PRACTICE EXERCISES 1 - 2: A number of couch potatoes were asked “What is the most important thing in the universe?” Their responses are summarized in the pie chart below. 1. What percent said “Playstation?” A. 36.4% B. 20% C. 80% D. 63.6% 2. What percent didn’t say “Xbox?” A. 12.0% B. 88.0% C. 21.8% D. 78.2%
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3 - 4: Refer to the bar graph below, showing the religious affiliations of US presidents. 3. What percent of US presidents were Unitarian? A. 4.0% B. 40.0% C. 9.5% D. 95% 4. What percent weren’t Presbyterian? A. 96.0% B. 85.7% C. 14.7% D. 4.0% 5. Last year, Gog the cave man owned 44 stones and 11 sticks. This year, Gog the cave man owns 39 stones and 42 sticks. Find the percent decrease in stones. A. 11.36% B. 112.82% C. 88.64% D. 45.45% 6. Last year, Dorothy owned 143 ear rings and 79 nose rings. This year, Dorothy owns 41 ear rings and 150 nose rings. Find the percent increase in nose rings. A. 89.87% B. 71.33% C. 47.33% D. 147.06% 7. Last year, Dan owned 113 vinyl LP records. This year, Dan's supply of vinyl LP records has increased by approximately 67%. How many vinyl LP records does Dan have now? A. 76 B. 7571 C. 180 D. 189 8. Last year, Socrates owned 574 Pokemon cards. This year, Socrates's supply of Pokemon cards has decreased by approximately 32%. How many Pokemon cards does Socrates have now?. A. 184 B. 18368 C. 542 D. 390
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The table at right shows the percentile distribution IQ Percentile of people according to IQ. 145 99 Refer to it for exercises 15 - 17. 130 97 115 84 9. What percent of people have IQs less than 85? 101 50 A. 16 B. 5 C. 4 D. 21 85 16 70 4 10. What percent of people have IQs of 130 or more? 55 1 A. 99 B. 97 C. 196 D. 3 11. Approximately what percent of people have IQs between 101 and 130?
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