Q. 4 The following variables X and Y are both ratio scores: Participant Y 1 3 4 8. 6. 6. 8. 7. 4 8. 21 9. 4 10 6. 51 a. Calculate the appropriate correlation coefficient. b. Determine the regression equation. c. Compute the standard error of the estimate. 2345 1692
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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![Q. 4
The following variables X and Y are both ratio scores:
Participant
1
2.
3
3
4
8.
15.
mimnumai
1
7
6.
7
8.
2
6.
10
a. Calculate the appropriate correlation coefficient.
b. Determine the regression equation.
c. Compute the standard error of the estimate.
d. Assume, r for X-5 and X=7 are 4.87 and 7.21 respectively. If any of the predicted scores
are not the actual scores the subjects obtained, by how much do you expect them to be
wrong?
How much smaller is this error (in d above) than if you used the mean of all scores to
predict Y scores.
e.
f. What is your answer in e above called and why?
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