the objects described by a set of data. They may be people, animals or things.
Any characteristic of an individual that can take different values for different individuals.
This places individuals into certain groups or categories.
This takes a numerical value for which arithmetic operations such as adding and averaging make sense.
This of a variable tells us what values the variable takes and how often it takes these values.
An individual observation that falls outside the overall pattern of the graph.
If a histrogram of a certain distribution has both the right and left sides approximately equal.
A distribution in which the right side of the histrogram (containing the half of observations with larger values) extends much farther out than the left.
A distribution in which the left side of the histrogram (containing the half of observations with larger values) extends much farther out than the right.
the "nth" of this of a distribution is the value such that n percent of the observations fall at or below it.
The midpoint of a distrbiution, the number such that half the observations are smaller and the other half are larger.
The average of all the data.
The median of the observations whose position in the ordered list is to the left of the location of the overall median.
The median of the observations whose position in the ordered list is to the right of the location of the overall median.
The distance between the first and third quartiles.
This of a data set consists of the smallest observation, the first quartile, the median, the third quartile, and the largest observation, writting in order from smallest to largest.
1.5 X IQR
Call an observation an outlier if it falls more than ___________ above the third quartile.
This is a graph of the five-number summary, with outliers plotted individually.
This of a set of observations is the average of the square of the deviations of the observations from their mean.
Standard Deviation s
is the quare root of the variance s².