The Basics

Math/Measures

Freqs (for) Geeks

Centers & Dispersion

Hypothetically Speaking

100

This Greek symbol is an instruction meaning "sum the following".

What is Sigma?

100

Variable manipulated by the researcher.

What is the Independent Variable?

100

If your data represent categories you could use this kind of chart to display them...but don't expect any refreshments

What is a bar chart?

100

Measure of central tendency most subject to outliers?

What is the mean?

100

This shorthand symbol is used to represent the Null Hypothesis.

What is H₀?

200

This type of research can establish causation.

What is a experimental research?

200

Scale of measurement with categories.

What is the nominal scale?

200

The formula 1-n represents what kind of range?

What is the exclusive range?

200

The square root of the variance.

What is the standard deviation?

200

A non-directional hypothesis uses this kind of test:

What is a two-tailed test?

300

Type of sampling necessary to create representative sample.

What is random sampling?

300

This variable represents your outcome data.

What is the dependent variable?

300

A curve continuing to approach but never touching the horizontal axis is said to be:

What is asymptotic?

300

Another name for the 50th percentile.

What is the median?

300

Too often people say they "have a theory" when really they are referring to this construct:

What is a hypothesis?

400

A number (e.g., mean) calculated on population data rather than sample data.

What are parameters?

400

This differentiates the ratio from the interval scale of measurement.

What is a meaningful or true zero?

400

Value on measurement scale below which a specified percentage of scores fall.

What is a percentile or percentile point?

400

Measure of central tendency often used with skewed distributions.

What is the mode?

400

A measure of how well a sample represents the population

What is sampling error?

500

Method of knowing that relies on objective assessment.

What is empiricism? (Will also accept The Scientific Method)

500

This is the formal name of the common correlation:

What is the Pearson product-moment correlation?

500

If you take a standardized test (e.g. SAT, ACT, GRE) you will receive this kind of numeric indicator of your performance along with your raw score.

What is a percentile rank?

500

This is a standardized score created from a raw score, the mean, and the standard deviation: