Shape
the distribution if left and right sides of graph are similar
symmetrical
used only when you want to emphasize relation to the whole
pie chart
the midpoint of a distribution
median
Any characteristic of an individual, it can take different values for different individuals
variable
If the right side or left side of a graph is longer than one or the other
skewed
lines represent each category as a bar
bar-graph
Defined as IQR=Q3-Q1
interquartile range
The pattern of variation of a variable
distribution
graph contains one single peak
unimodal
A graph where each data value is shown as a dot above its location on a number line
dotplot
The median of the observations whose position is in the ordered list to the left of the median
the first quartile
A conclusion drawn beyond the data at hand
inference
Graph has two clear peaks
multimodal
A simple graphical display for fairly small sets of data
stemplot
Measures the average distance of the observations from their mean. It is calculated by taking the average of the squared distances and square-rooting it
standard deviation
places an individual into one of several groups of categories
categorical variable
The graph contains more than two clear peaks
The most common graph of the distribution of one quantitative variable, usually set up like a table/bar graph
histogram
An observation is called an _____ if it falls more than 1.5xIQR above the third quartile or below the first quartile
outlier
this takes numerical values for which it make sense to find an average