IN CLASS PRACTICE EXERCISES COVERED TODAY IN CLASS ANSWER.docx

# IN CLASS PRACTICE EXERCISES COVERED TODAY IN CLASS ANSWER.docx

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CHAPTER 2 11. a. 2 4 =16 suggests 5 classes b (31-25)/5 = 6/5 = 1.2 Use interval of 1.5 c 24 d. Units f Relative frequency 24 to under 25.5 2 0.125 25.5 to under 27 4 0.250 27 to under28.5 8 0.500 28.5 to under 30 0 0.000 30 to under 31.5 2 0.125 Total 16 1.000 e. The largest concentration is in the 27 up to 28.5 class (8). (LO2-4 & 2-5) 12. a. 2 4 = 16, 2 5 = 32, suggest 5 classes b. 47/5 = 9.4 Use interval of 10. c. 50 d. f Relative frequency 50 to under 60 4 0.20 60 to under 70 5 0.25 70 to under 80 6 0.30 80 to under 90 2 0.10 90 to under 1003 0.15 Total 20 1.00 e. The fewest number is about 50, the highest about 100. The greatest concentration is in classes 60 up to 70 and 70 up to 80. (LO2-4 & 2-5) CHAPTER 6 51. a. almost 0.5000, because 30 490 5.11 90 z  b. 0.2514, found by 0.5000 0.2486 c. 0.6374, found by 0.2486 + 0.3888 d. 0.3450, found by 0.3888 0.0438 (LO6-4, 6-5 & 6-6) CHAPTER 8 22. a. 0.75, found by 300/400. (LO8-5) b. 0.0217, found by 400 ) 75 . 0 1 (

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• Fall '17
• Harshad number, relative frequency, 81%, 71.7 hours

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