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## Statistics Chapter 9

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**MS133 Final Exam Scores**79 86 79 65 78 91 78 94 88 75 71 53 95 96 79 62 79 67 64 77 69 58 74 69 78 78 91 89 49 68 63 77 86 84 77**5 A’s out of how many total grades? 35**• What percent of the class made an A?**5 A’s out of how many total grades? 35**• What percent of the class made an A? 5/35 ≈ 0.14 ≈14% • What percent of the pie should represent the A’s?**5 A’s out of how many total grades? 35**• What percent of the class made an A? 5/35 ≈ 0.14 ≈14% • What percent of the pie should represent the A’s? 14% • How many degrees in the whole pie?**5 A’s out of how many total grades? 35**• What percent of the class made an A? 5/35 ≈ 0.14 ≈14% • What percent of the pie should represent the A’s? 14% • How many degrees in the whole pie? 360°**5 A’s out of how many total grades? 35**• What percent of the class made an A? 5/35 ≈ 0.14 ≈14% • What percent of the pie should represent the A’s? 14% • How many degrees in the whole pie? 360° • 14% of 360° is how many degrees?**5 A’s out of how many total grades? 35**• What percent of the class made an A? 5/35 ≈ 0.14 ≈14% • What percent of the pie should represent the A’s? 14% • How many degrees in the whole pie? 360° • 14% of 360° is how many degrees? .14 x 360° ≈ 51°**14 C’s out of 35 grades**• 14/35 = .4 = 40% • .4 x 360° = 144°**8 D’s out of 35 grades**• 8/35 ≈ .23 ≈ 23% (to the nearest percent) (keep the entire quotient in the calculator) • x 360° ≈ 82°**3 F’s out of 35 grades total**• 3/35 ≈ .09 ≈ 9% (to the nearest percent) (keep the entire quotient in the calculator) • x 360° ≈ 31° • Check the remaining angle to make sure it is 31°**Make a Pie Chart**• Gross income: $10,895,000 • Labor: $5,120,650 • Materials: $4,031,150 • New Equipment: $326,850 • Plant Maintenance: $544,750 • Profit: $871,600**Labor: $5,120,650 = 47% 169°**10,895,000 • Materials: $4,031,150 = 37% 133° 10,895,000 • New Equipment: $326,850 = 3% 11° 10,895,000 • Plant Maintenance: $544,750 = 5% 18° 10,895,000 • Profit : $871,600 = 8% 29° 10,895,000**Histogram**• Table 9.2 Page 527**Measures of Central Tendency Lab**Print your first name below.**Getting Mean with Tiles**• Use your colored tiles to build a column 9 tiles high and another column 15 tiles high. Use a different color for each column.**Getting Mean with Tiles**• Use your colored tiles to build a column 9 tiles high and another column 15 tiles high. Use a different color for each column. • Move the tiles one at a time from one column to another “evening out” to create 2 columns the same height. • What is the new (average) height?