Unit !

Question 1

objects described by a set of data.

Answer 1

Individual

Question 2

any characteristic of an individual.

Answer 2

Variable

Question 3

these variables place individuals into one of several groups or categories

Answer 3

Categorical Variables

Question 4

these variables are numerical values for which It makes sense to find an average. ex Area Codes
Building floor numbers

Answer 4

quantitative variable

Question 5

To display the distribution of categorical data, make a

Answer 5

bar graph

Question 6

this gives the
percent or proportion of
individuals that have a specific value for one categorical variable.

Answer 6

marginal relative
frequency

Question 7

gives the
percent or proportion of
individuals that have a
specific value for one
categorical variable and
a specific value for
another categorical
variable.

Answer 7

joint relative
frequency

Question 8

gives the
percent or proportion of
individuals that have a
specific value for one
categorical variable
among individuals who
share the same value of
another categorical
variable (the condition).

Answer 8

conditional relative
frequency

Question 9

The bars are
grouped together based
on the values of one of
the categorical variables
and placed side by side.

Answer 9

side by side bar graph

Question 10

displays the distribution
of a categorical variable
as segments of a
rectangle, with the area
of each segment
proportional to the
percent of individuals in
the corresponding
category.

Answer 10

segmented bar graph

Question 11

There is an __
between two variables if
knowing the value of
one variable helps us
predict the value of the
other.

Answer 11

association

Question 12

If knowing the value of
one variable does not
help us predict the value
of the other, then there
is

Answer 12

no association

Question 13

A —- shows each
data value as a dot
above its location on a
number line.

Answer 13

dotplot

Question 14

A distribution is roughly symmetric if

Answer 14

if the right
side of the graph is
approximately a mirror image of the left side.

Question 15

A distribution is skewed to the right if

Answer 15

the right side of the graph is much longer than the left.

Question 16

A distribution is skewed to the left if

Answer 16

the left side of the graph is much longer than the right.

Question 17

You can describe the distribution of a graph by

Answer 17

center, shape, outlier, and variability.

Question 18

To describe shape?

Answer 18

Whether the distribution is symmetrical, skewed to the right, or skewed to the left.

Question 19

Always be sure to include — when you are asked to describe a distribution. This means using the variable name, not just the units the variable is measured in.

Answer 19

CONTEXT

Question 20

When comparing distributions of quantitative data, it’s not enough just to list values for the center and variability of each distribution. You must explicitly compare these values, using words like

Answer 20

greater than, less than, about the same as.

Question 21

What two components does one need to have a proper description of a distribution?

Answer 21

Context, Comparative language

Question 22

A — shows each
data value separated into
two parts: a stem, which
consists of all but the final
digit, and a leaf, the final
digit.

Answer 22

stemplot

Question 23

Sometimes, We can get a better picture of the distribution in a stemplot by

Answer 23

splitting stems.

Question 24

use this when Two distributions of the same quantitative variable can be compared

Answer 24

back-to-back stemplot

Question 25

A —- shows each
interval of values as a bar. The
heights of the bars show the
frequencies or relative
frequencies of values in each
interval.

Answer 25

histogram