Given the spot speed of 20 vehicles on a certain traffic section. Use 8 classes. Determine: a. The arithmetic mean speed b. The standard deviation c. The median speed (Locate in the figure) d. The 85th-percentile speed (Locate in the figure) Car No. 1 2 3 4 5 Speed (kph) 71.7 71.5 78.5 63.2 74.3 Car No. 6 7 8 9 10 Speed (kph) 62.5 63.44 60.7 69.1 65.9 Car No. 11 12 13 14 15 Speed (kph) 83.1 82.3 72.7 68.4 82.8 Car No. 16 17 18 19 20 Speed (kph) 86.8 89.7 84.2 80.5 80.8

Given the spot speed of 20 vehicles on a certain traffic section. Use 8 classes. Determine: a. The arithmetic mean speed b. The standard deviation c. The median speed (Locate in the figure) d. The 85th-percentile speed (Locate in the figure) Car No. 1 2 3 4 5 Speed (kph) 71.7 71.5 78.5 63.2 74.3 Car No. 6 7 8 9 10 Speed (kph) 62.5 63.44 60.7 69.1 65.9 Car No. 11 12 13 14 15 Speed (kph) 83.1 82.3 72.7 68.4 82.8 Car No. 16 17 18 19 20 Speed (kph) 86.8 89.7 84.2 80.5 80.8

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 1GP

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