A number with a true zero.
What is ratio level data?
This simple graphical display is helpful for summarizing a categorical variable. It shows both the count and the proportion.
What is a frequency table.
Captures the middle 50% of values for a numeric variable
What is interquartile range.
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
Marks the three values that divide a data set into four equal parts
What is quartiles.
Categories of data like race: Black/African American, Latino/a, Asian, White, Other
What is nominal?
This graph is used to display one continuous variable
What is a histogram
How much a distribution varies from the mean
What is the standard deviation?
A number without a true zero, like IQ or SAT score.
What is interval level data?
Graph used to display two continuous variables, one of which is a measure of time.
What is a line graph
Where the data tend to fall
What is central tendency
Represented by a bell shaped curve with one peak in the middle
What is a normal distribution.
When a ratio level variable is changed to be nominal level
What is transforming a variable