Basic concepts
Mathematical set of procedures for organizing, summarizing, and interpreting information
Statistics
Scale of measurement consisting of discrete, separate labels. We can tell they are different but cannot tell the direction or size of the difference.
Nominal
A type of variable that is divisible into an infinite number of fractional parts. There will always be a third value between any given two values.
Continuous
Difference between a histogram and a bar graph
Space between bars
While N stands for all the individuals in the ____, n stands for the individuals in the ____
Population/sample
Scale of measurement consisting of organized categories. We can tell the _____ of the difference but not the size.
Ordinal/direction
The two types of variables studied in class
Continuous and discrete
Ways to present a frequency distribution of data from a sample
Tables and graphs
Three techniques to control for the influence of external variables in experimental research
Random assigment, matching, and holding external variables constant
Scale of measurement consisting of ordered categories. We can tell the ___ as well as the size of the difference.
Interval/direction/size
First three mathematical operations
1- Calculations in parentheses
2- Squaring or raising
3- Multiplication or division
Three types of graphs used to present frequency distributions of sample data
(Modified) Histograms, polygons, bar graphs