In a negative relationship, _________.
a. as X increases, Y increases
b. as X decreases, Y decreases
c. as X increases, Y increases, and as X decreases, Y decreases
d. as X increases, Y decreases
In a positive relationship, _________.
a. as X increases, Y increases
b. as X decreases, Y decreases
c. as X increases, Y increases and as X decreases, Y decreases
d. as X increases, Y decreases
In the equation Y = bX + a, X and Y, a is _________.
a. a constant giving the value of the Y axis intercept
b. a constant giving the value of the slope of the line
c. a variable relating X to Y
d. a variable relating Y to X
In the equation Y = bX + a, X and Y, b is _________.
a. a constant
b. the slope of the line
c. the Y axis intercept
d. a constant and slope of the line
e. a variable
In the equation Y = bX + a, X and Y are _________.
a. constants c. population parameters
b. statistics d. variables
If a relationship is linear, _________.
a. the relation can be most accurately represented by a straight line
b. all the points fall on a curved line
c. the relationship is best represented by a curved line
d. all the points must fall on a straight line
A scatter plot _________.
a. has to do with electron scatter c. must be linear
b. is a graph of paired X and Y values d. is a frequency graph of X values
Correlation and regression differ in that _________.
a. correlation is primarily concerned with the size and direction of relationships
b. regression is primarily used for prediction
c. both of these are true
d. neither of these are true
The z score and the z distribution are the same thing.
Indicate whether the statement is true or false
To do a z transformation, one must know only the population mean and the value of the raw score to be transformed.
Indicate whether the statement is true or false
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