Correlation Coefficient and Linear Regression Review

Quiz
•
Mathematics
•
11th Grade
•
Hard
Standards-aligned
Anthony Clark
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Estimate the correlation coefficient for this scatterplot.
r = 0.56
r = -0.56
r = 0.92
r = -0.92
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements is not true of the correlation r between the lengths in inches and weights in pounds of a sample of brook trout?
r must take a value between -1 and 1.
r is measured in inches.
If longer trout tend to also be heavier, then r>0.
r would not change if we measured the lengths of the trout in centimeters instead of inches.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is TRUE?
I. Random scatter in the residuals indicates a linear model.
II. If two variables are very strongly associated, then the correlation between them will be near 1 or -1.
III. Changing the units of measurement for x or y changes the correlation coefficient.
I only
II only
I and II only
I, II and III
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?
The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth.
The y-intercept is 100, which is where the graph crosses the y-axis.
100 is where the data starts on the y-axis.
The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds.
Tags
CCSS.HSF.LE.B.5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the correlation coefficient and linear regression of the data set: (1,7) (2,4) (3,-1) (8,-9) (6,-3) (-1,10).
r = .98 & y = 7.9x - 2.1
r = .97 & y = 7.9x - 2.1
r = .95 & y = 7.9x - 2.1
r = .98 & y = -2.1x + 7.9
r = .97 & y = -2.1x + 7.9
6.
MATCH QUESTION
1 min • 1 pt
A linear regression model is run on a set of data.<\/p>
Match the r-value to its description.<\/p>
weak negative correlation
+0.31<\/p>
strong positive correlation
-0.97<\/p>
weak positive correlation
+0.99<\/p>
weak negative correlation
-0.44<\/p>
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.
0.07 weak
-0.26 weak
-0.26 moderate
0.07 strong
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