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week 8 8&amp; 9 Test

# week 8 8&amp; 9 Test - Name Date MAT115 Test 4 Chapters...

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Name:_____________________ Date:______________________ MAT115 Test 4 Chapters 8 and 9 25 problems – 4 points each 100 points possible Solve all problems and attach your solutions document in your Individual Forum (IF) . Remember to show all steps and check your work carefully. Problem Remember to simplify all answers Grading Comments 1. Find the mean, and mode of the following set of numbers. 5, 8, 7, 11, 4, 3,12, 13, 5, 6, 10 mean =(5+ 8+ 7+ 11+ 4+ 3+12+ 13+ 5+ 6+ 10)/11=7.6 Ascending order: 3 ,4 ,5, 5 6, 7, 8, 10, 11,12, 13 Mod is 5 (have the most repetition) 2. Find the first and third quartiles, Q 1 and Q 3 , of the following set of numbers. 13, 7, 15, 13, 13, 12, 9, 11, 19, 9 Ascending order: 13, 7, 9, 9,11,12, 13, 13, 15, 19 First quartile is 9, the middle number of this collection 13, 7, 9, 9,11, Third quartile is 13, the middle number of this collection 12, 13, 13, 15, 19 3. Find the five-number summary of the following set of numbers. 10, 4, 9, 12, 6, 11, 6, 2, 7, 6 Ascending order: 2,4, 6, 6,6,7, 9, 10, 11, 12 Median = (6+7)/2=6.5 1 st quartile is 6, the middle number of this collection 2,4, 6, 6,6, Third quartile is 10, the middle number of this collection 7, 9, 10, 11, 12 Smallest is 2, largest is 12 Ms.J. Webb Page 1 MAT 115

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5 number summary is 2,6,6.5,10,12 4. Liza kept the following records of her utility bills for 12 months: \$29, \$24, \$32, \$28, \$45, \$30, \$29, \$62, \$40, \$39, \$33, \$29 (a) Find the mean of Liza's monthly utility bill.
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