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

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
icon
Related questions
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.

(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
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt
Holt Mcdougal Larson Pre-algebra: Student Edition…
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL