1) 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. (CHOOSE ONE) i) There is likely to be a positive association. As alcohol consumption increases, performance on a test of coordination will tend to increase. ii) There is likely to be a negative association. As alcohol consumption increases, performance on a test of coordination will tend to decrease. iii) 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. i) 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. i) 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. ii) 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. iii) 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. i) There is likely to be a positive association. As forearm length increases, foot length will tend to increase. ii) There is likely to be a negative association. As forearm length increases, foot length will tend to decrease. iii) No association would be expected between forearm length and foot length. 1) Which of the following values of the correlation coefficient r indicates a stronger correlation than 0.72? a) −0.70 b) 0.65 c) −0.75 d) 0.60

1) 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. (CHOOSE ONE) i) There is likely to be a positive association. As alcohol consumption increases, performance on a test of coordination will tend to increase. ii) There is likely to be a negative association. As alcohol consumption increases, performance on a test of coordination will tend to decrease. iii) 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. i) 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. i) 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. ii) 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. iii) 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. i) There is likely to be a positive association. As forearm length increases, foot length will tend to increase. ii) There is likely to be a negative association. As forearm length increases, foot length will tend to decrease. iii) No association would be expected between forearm length and foot length. 1) Which of the following values of the correlation coefficient r indicates a stronger correlation than 0.72? a) −0.70 b) 0.65 c) −0.75 d) 0.60

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

1) 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. (CHOOSE ONE)

i) There is likely to be a positive association. As alcohol consumption increases, performance on a test of coordination will tend to increase.

ii) There is likely to be a negative association. As alcohol consumption increases, performance on a test of coordination will tend to decrease.

iii) 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.

i) 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.

i) 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.

ii) 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.

iii) 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.

i) There is likely to be a positive association. As forearm length increases, foot length will tend to increase.

ii) There is likely to be a negative association. As forearm length increases, foot length will tend to decrease.

iii) No association would be expected between forearm length and foot length.

1) Which of the following values of the correlation coefficient r indicates a stronger correlation than 0.72?

a) −0.70

b) 0.65

c) −0.75

d) 0.60

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