WorksheetsChapter 2: FIA
Total questions: 10
Worksheet time: 5mins
Determine the direction of the relationships below.
positive linear relationship
negative linear relationship
none
no significant relationship
Determine the direction of the relationship of Variable X and Y
positive linear relationship
negative linear relationship
none
The correlation coefficient is a number "r" such that:
−1<r<1
−1>r>1
−1≤r≤1
−1≥r≥1
What does a correlation coefficient of
r = 0 mean?
perfect positive correlation
perfect negative correlation
no correlation
Two variables have a positive association when
the value of one variable tends to increase as the other variable increases.
the value of one variable tends to increase regardless how the other variable change.
the value of one variable tends to increase as the other variable decreases.
the values of both variables are always positive.
What would the correlation be between math grades and the time it takes to run a mile ?
Positive Correlation
No Correlation
Negative Correlation
Given the following Scatter Plot, select the option that is most likely the r value.
r=0.27
r=0.94
r=−0.87
r=−0.96
Given the following Scatter Plot, select the option that is most likely the r value.
r=0.98
r=−0.75
r=0.15
r=−0.59
For the data given below, calculate the covariance, Sxy
819.9525
351.2015
159.2399
101.4115
For the data given below, calculate the correlation coefficient, rxy
0.59
0.65
0.88
0.90
