The Basics Category
Math/Measures
Freqs & Geeks
Centers & Dispersion
Normal Curve & z Scores
100
A number calculated on sample data (e.g. a mean)
What is a statistic?
100
Variable manipulated by the researcher.
What is the Independent Variable?
100
All the possible values of a score and how often they occur
What is a frequency distribution?
100
Measure of central tendency least subject to sampling variation?
What is the mean?
100
Mean of the z distribution.
What is zero?
200
This type of research can establish causation.
What is a experimental research?
200
Scale of measurement with unordered categories.
What is the nominal scale?
200
A distribution that is not symmetrical is:
What is skewed?
200
The sum of the deviation scores about the mean.
What is zero?
200
Approximate percentage of scores within 1 SD of the mean in a z distribion.
What is approximately 68%?
300
Type of sampling necessary to create representative sample.
What is random sampling?
300
A type of variable with no possible values between adjacent units on the scale.
What is a discrete variable?
300
The 3 shapes a distribution may be are:
What are symmetrical, positively skewed, and negatively skewed?
300
Another name for the 50th percentile.
What is the median?
300
A curve continuing to approach but never touching the horizontal axis is said to be:
What is asymptotic?
400
A number (e.g., mean) calculated on population data.
What is a parameter?
400
This differentiates the ratio from the interval scale of measurement.
What is a meaningful or true zero?
400
A frequency distribution with infinitely tiny bins.
What is a probability density function?
400
Measure of central tendency often used with skewed distributions.
What is the median?
400
Another term for z scores.
What is "standard scores?"
500
Mathematical symbol indicating summation
What is sigma?
500
Name of scale in SPSS that combines interval and ratio data.
What is "Scale?"
500
The percentage of scores with values lower than the the score specified.
What is a percentile rank?
500
What is the formula for the sum of squares?
500