MAT 120 Major Project for MAT 120

# MAT 120 Major Project for MAT 120 - page 1 Major Project...

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page 1 Major Project for MAT 120 1. Average age of friends on my Facebook account is 19 years. 2. Purpose of project: to determine the age of my Facebook friends. 3. The population was 100 Facebook friends, and I took a random sampling of 30 of those friends. 4. I used the random sampling technique. I randomly selected 30 friends’ ages. 5. Population Raw Data: (highlighted data = 30 random data points) 18 17 18 18 16 18 19 19 17 19 17 24 15 19 18 18 19 17 18 18 18 19 18 19 21 21 19 15 21 18 19 17 15 17 19 18 38 18 17 20 21 17 28 16 18 22 17 32 17 40 18 17 17 18 42 18 40 18 17 20 14 18 20 18 18 17 17 19 18 20 19 18 18 29 15 16 16 17 15 21 18 18 17 17 20 16 19 20 18 17 13 20 21 17 17 18 38 18 20 18

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page 2 6. Range = 42 – 14 = 28 5 Classes Class Width = 28/5 classes = 5.6 (6 classes) Class Limits Class Boundaries Midpoint s (Xm) Freq. Cumulative Frequency f.Xm f.X²m 14 - 19 13.5 – 19.5 16.5 17 17 280.5 4628.25 20 - 25 19.5 – 25.5 22.5 8 25 180.0 4050.00 26 - 31 25.5 – 31.5 28.5
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## This note was uploaded on 11/18/2011 for the course MATH 120 taught by Professor Smith during the Spring '10 term at Lander.

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MAT 120 Major Project for MAT 120 - page 1 Major Project...

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