
Correlation and Regression Concepts

Interactive Video
•
Mathematics, Science
•
10th - 12th Grade
•
Hard

Jackson Turner
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between two variables called when one increases and the other decreases?
Negative correlation
Positive correlation
Direct correlation
No correlation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a method to study correlation?
Karl Pearson's method
Scatter diagram
Spearman's method
Regression analysis
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the scatter diagram represent in correlation?
Statistical table
Mathematical formula
Theoretical concept
Graphical representation
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Karl Pearson's method, what is the formula for the coefficient of correlation?
R = summation X / summation Y
R = summation XY / (summation X + summation Y)
R = (summation X^2 + summation Y^2) / summation XY
R = summation XY / sqrt(summation X^2 * summation Y^2)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in calculating Karl Pearson's coefficient of correlation?
Finding the total of X and Y
Calculating the arithmetic mean of X and Y
Squaring the deviations
Multiplying X and Y
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Spearman's rank correlation, what is the formula for rank correlation?
1 + summation D^2 / (n(n^2 - 1))
1 - 6 * summation D^2 / (n(n^2 - 1))
1 + 6 * summation D^2 / (n(n^2 - 1))
1 - summation D^2 / (n(n^2 - 1))
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When calculating ranks in Spearman's method, what should you avoid doing?
Arranging observations in ascending order
Using the given order of observations
Calculating the difference in ranks
Squaring the differences
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