Organizes, summarizes and displays data
What are descriptive statistics
A number with a true zero.
What is ratio level data?
This simple graphical display is a list with two columns.
What is a frequency table.
Measures the amount of differences among the data points
Spread
Uses data to make predictions about the larger population
What are inferential statistics
Rank-ordered groups like: never, sometimes, always
What is ordinal level data?
Uses vertical bars that don't touch showing the percentage of cases for each category of the variable.
What is a bar graph
68% of individuals fall within...
One standard deviation of the mean
There is no relationship between the variables
What is the null hypothesis
Categories of data like race: Black/African American, Latino/a, Asian, White, Other
What is nominal?
Graph of single points rather than bars.
What is a frequency polygon or line graph
How much a distribution varies from the mean
What is the standard deviation?
Chi-square, t-test, ANOVA, correlation
What are statistical tests
A number without a true zero, like IQ or SAT score.
What is interval level data?
Bars that touch each other representing quantitative increments from one bar to the next.
What is a historgram
Where the data tend to fall
What is central tendency
The mean, median and mode are in the middle of this graph
What is a normal distribution
When a ratio level variable is changed to be nominal level
What is transforming a variable