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Q 1/25
Score 0
What does bivariate data involve?
60
one variable
multiple variables
two variables
continuous data
Q 2/25
Score 0
Which graphical representation is used to illustrate the relationship between two continuous variables?
60
pie chart
histogram
box plot
scatter plot
25 questions
Q.
What does bivariate data involve?
1
60 sec
Q.
Which graphical representation is used to illustrate the relationship between two continuous variables?
2
60 sec
Q.
What does the shape (form) of the points represent in a scatter plot?
3
60 sec
Q.
How is the strength of association between two variables estimated based on a scatter plot?
4
60 sec
Q.
Which correlation coefficient is commonly used to measure the strength of association between two variables?
5
60 sec
Q.
What does the Pearson’s sample correlation coefficient measure?
6
60 sec
Q.
In regression analysis, which variable is being predicted?
7
60 sec
Q.
What does the best-fit line represent in a scatter plot?
8
60 sec
Q.
What does the slope of the regression line represent?
9
60 sec
Q.
How is the y-intercept of the regression line interpreted?
10
60 sec
Q.
What does a positive slope of the regression line indicate?
11
60 sec
Q.
When constructing a scatter plot, which variable is typically represented on the x-axis?
12
60 sec
Q.
The relationship between two variables in a scatter plot is called linear if:
13
60 sec
Q.
Which statistical measure assesses the direction and strength of the linear relationship between two variables?
14
60 sec
Q.
In a scatter plot, what does variation (strength) refer to?
15
60 sec
Q.
What does a negative slope of the regression line indicate?
16
60 sec
Q.
Which of the following best describes the relationship between independent and dependent variables?
17
60 sec
Q.
In an experiment testing how sunlight affects plant growth which of the following is the independent variable?
18
60 sec
Q.
Which of the following is the first step in testing the significance of the correlation coefficient (r)?
19
60 sec
Q.
In which scenario would regression analysis be most appropriate?
20
60 sec
Q.
Which of the following represents the formula for calculating the slope (m) of the regression line?
21
60 sec
Q.
In a regression analysis the slope of the regression line is 2 and the y-intercept is 3. What does the slope tell us about the relationship between the independent and dependent variables?
22
60 sec
Q.
What does it mean if a correlation coefficient (r) is close to 0?
23
60 sec
Q.
Which would most likely result in a perfect negative correlation (r = -1)?
24
60 sec
Q.
Which condition must be met to perform a linear regression analysis?
