For each of the following pairs of variables, is there likely to be a positive association, a negative association or no association? Briefly explain your reasoning. (a) Amount of alcohol consumed and performance on a test of coordination. There is likely to be a positive association. As alcohol consumption increases, performance on a test of coordination will tend to increase. There is likely to be a negative association. As alcohol consumption increases, performance on a test of coordination will tend to decrease. No association would be expected between amount of alcohol consumed and performance on a test of coordination. (b) Height and grade point average for university students. There is likely to be a positive association. As height increases, grade point average for university students will tend to increase. There is likely to be a negative association. As height increases, grade point average for university students will tend to decrease. No association would be expected between height and grade point average. (c) Kilometres of running per week and time for a 5-km run. There is likely to be a positive association. As kilometres of running per week increase, running times for a 5-km run will tend to increase. There is likely to be a negative association. As kilometres of running per week increase, running times for a 5-km run will tend to decrease. No association would be expected between kilometres of running per week and running times for a 5-km run. (d) Forearm length and foot length

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 15PPS

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For each of the following pairs of variables, is there likely to be a positive association, a negative association or no association? Briefly explain your reasoning. (a) Amount of alcohol consumed and performance on a test of coordination. There is likely to be a positive association. As alcohol consumption increases, performance on a test of coordination will tend to increase. There is likely to be a negative association. As alcohol consumption increases, performance on a test of coordination will tend to decrease. No association would be expected between amount of alcohol consumed and performance on a test of coordination. (b) Height and grade point average for university students. There is likely to be a positive association. As height increases, grade point average for university students will tend to increase. There is likely to be a negative association. As height increases, grade point average for university students will tend to decrease. No association would be expected between height and grade point average. (c) Kilometres of running per week and time for a 5-km run. There is likely to be a positive association. As kilometres of running per week increase, running times for a 5-km run will tend to increase. There is likely to be a negative association. As kilometres of running per week increase, running times for a 5-km run will tend to decrease. No association would be expected between kilometres of running per week and running times for a 5-km run. (d) Forearm length and foot length. There is likely to be a positive association. As forearm length increases, foot length will tend to increase. There is likely to be a negative association. As forearm length increases, foot length will tend to decrease. No association would be expected between forearm length and foot length.

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