AP Stats Concepts Test Questions With
All Solved Solutions.
Individuals - Answer The objects described by a set of data. They may be people, animals, or
things.
Variable - Answer Any characteristic of an individual. It can take different values for different
individuals.
Categorical variable - Answer Records which of several groups or categories an individual
belongs to.
Quantitative variable - Answer Takes numerical value for which it makes sense to do
arithmetic operations like adding and averaging.
Distribution - Answer Tells us what values it takes and how often it takes these values.
histogram - Answer The most common graph of the distribution of one quantitative variable.
outlier - Answer An individual in any graph of data that falls outside the overall pattern of the
graph
symmetric - Answer A distribution where the right and left sides of the histogram are
approximately mirror images of each other
skewed to the right - Answer A distribution where the right side of the histogram extends
much farther out than the left side
skewed to the left - Answer A distribution where the left side of the histogram extends much
farther out than the right side
stem - Answer The part of a stemplot that consists of all but the final (rightmost) digit
, time plot - Answer Plots each observation of a variable against the time at which it was
measured
trend - Answer a common overall pattern which has a long-term upward or downward
movement overtime
back-to-back stemplot - Answer a type of stemplot that helps to compare two distributions
mean - Answer the most common measure of center for distributions
median - Answer the "middle value" of a histogram or other distribution. Also the second
quartile
first quartile - Answer first quarter of a distribution. between minimum value and median
third quartile - Answer third quarter of a distribution. between median and maximum value
five-number summary - Answer consists of the minimum value, first quartile, median, third
quartile, and maximum value of a distribution. written in order from smallest to largest
boxplot - Answer Graph of the five-number summary
standard deviation - Answer a measure of spread that measures by looking at how far the
observations are from their mean. also the square root of the variance s^2
variance s^2 - Answer the average of the squares of the deviations of a set of observations
from their mean
density curve - Answer a curve that is always on or above the horizontal axis and has area
exactly 1 underneath it
median of a density curve - Answer the equal-areas point that divides the area under the
density curve in half
All Solved Solutions.
Individuals - Answer The objects described by a set of data. They may be people, animals, or
things.
Variable - Answer Any characteristic of an individual. It can take different values for different
individuals.
Categorical variable - Answer Records which of several groups or categories an individual
belongs to.
Quantitative variable - Answer Takes numerical value for which it makes sense to do
arithmetic operations like adding and averaging.
Distribution - Answer Tells us what values it takes and how often it takes these values.
histogram - Answer The most common graph of the distribution of one quantitative variable.
outlier - Answer An individual in any graph of data that falls outside the overall pattern of the
graph
symmetric - Answer A distribution where the right and left sides of the histogram are
approximately mirror images of each other
skewed to the right - Answer A distribution where the right side of the histogram extends
much farther out than the left side
skewed to the left - Answer A distribution where the left side of the histogram extends much
farther out than the right side
stem - Answer The part of a stemplot that consists of all but the final (rightmost) digit
, time plot - Answer Plots each observation of a variable against the time at which it was
measured
trend - Answer a common overall pattern which has a long-term upward or downward
movement overtime
back-to-back stemplot - Answer a type of stemplot that helps to compare two distributions
mean - Answer the most common measure of center for distributions
median - Answer the "middle value" of a histogram or other distribution. Also the second
quartile
first quartile - Answer first quarter of a distribution. between minimum value and median
third quartile - Answer third quarter of a distribution. between median and maximum value
five-number summary - Answer consists of the minimum value, first quartile, median, third
quartile, and maximum value of a distribution. written in order from smallest to largest
boxplot - Answer Graph of the five-number summary
standard deviation - Answer a measure of spread that measures by looking at how far the
observations are from their mean. also the square root of the variance s^2
variance s^2 - Answer the average of the squares of the deviations of a set of observations
from their mean
density curve - Answer a curve that is always on or above the horizontal axis and has area
exactly 1 underneath it
median of a density curve - Answer the equal-areas point that divides the area under the
density curve in half
