are sampled areas of a city. All intersections have approximately equal daily traffic. Ten of the intersections are controlled by yield signs, and ten are controlled by stop signs. The concentrations of CO (in parts per million) are given in the table below. Because the stop signs cause more cars to travel at lower speeds, encourage periods of engine idling, and create more acceleration-deceleration phases, it is hypothesized that intersections with stop signs will have higher CO concentrations. Is this hypothesis supported at a = 0.05? [Adapted from Elementary Statistics for Geographers, Burt, Barber, and Rigby, 2009] Carbon monoxide concentration, ppm Yield Signs 10 Stop Signs 31 15 9 16 21 17 28 22 14 27 13 11 58 12 29 18 24 20 30

are sampled areas of a city. All intersections have approximately equal daily traffic. Ten of the intersections are controlled by yield signs, and ten are controlled by stop signs. The concentrations of CO (in parts per million) are given in the table below. Because the stop signs cause more cars to travel at lower speeds, encourage periods of engine idling, and create more acceleration-deceleration phases, it is hypothesized that intersections with stop signs will have higher CO concentrations. Is this hypothesis supported at a = 0.05? [Adapted from Elementary Statistics for Geographers, Burt, Barber, and Rigby, 2009] Carbon monoxide concentration, ppm Yield Signs 10 Stop Signs 31 15 9 16 21 17 28 22 14 27 13 11 58 12 29 18 24 20 30

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2AGP

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