As the x variable increases and the y value decreases this is an example of ______ correlation.
What is negative?
100
A researcher wants to determine whether there is a relationship between the number of hours worked outside of school and grades. Which formula should the researcher use?
What is r = Σ [(X – MX)(Y – MY)]
√(SSX)(SSY)
100
_______ is the branch of statistics used in the development of tests and measures
What is psychometrics?
100
Estimate of how well a test measures what it purports to measure in a particular context
What is validity?
100
A statistical technique that provides specific quantitative information that predicts relationships between variables
What is regression?
200
If a correlation is 0, this indicates that there is (a) _____ relationship.
A) Moderate
B) No
C) Strong
What is B) no?
200
When determining a correlation, what is the first step?
What is figuring out if the scatterplot is linear?
200
In test design, what makes a good test item?
What is A good test item is reliable
A good test item is valid
A good test item discriminates test takers?
200
This is a logical result or deduction
What is an inference?
200
A statistical technique that allows us to predict an individual’s score on a dependent variable from his or her score on a dependent variable
What is simple linear regression?
300
You use this when the relationship between two variables is linear and the variables are continuous.
What is the Pearson Coefficient?
300
To find the nominator of the formula, you must:
What is subtracting the x value from mean of x values, subtracting the y value from mean of y values, and then multiplying them together. Finally you find the sum of all of the numbers.
300
This is consistency in measurement: getting the same thing every time
What is reliability?
300
Judgment concerning how relevant test items appear to be
If a test appears to measure what it is supposed to measure based on first glance of the items, it could be said to be high in _____.
What is face validity?
300
The equation you should use to find regression.
What is zŶ = (rXY)(zX)
400
John Wilkes booth.
What is the name of the person that killed the president?
400
To find the denominator you:
What is taking the square root of the X- value minus the mean of x values squared times the y value minus the mean of y values squared?
400
Proportion that indicates the ratio between the true score variance on a test and the total variance
What is the reliability coefficient?
400
Judgment of how adequately a test samples behavior representative of the universe of behavior that it was designed to sample
What is content validity?
400
The first thing one should use when looking for the regression with a z score.
What is calculating the z score?
500
You must have this in order to determine the critical values in correlation:
What is the degrees of freedom?
500
The difference between test-retest reliability and internal consistency.
What is a test that the measure is given twice to the same sample with a delay between tests and a test that assesses that all items are measuring the same idea?
500
What combination is not possible?
A)Valid and Reliable
B) Reliable but not valid
C)Valid but not Reliable
What is C) valid but not reliable?
500
After calculating the z score, to find the regression of a z score one should:
What is Multiplying the z score by the correlation coefficient and then converting the z score to a raw score?