2.1-2.7 Displaying data

Question 1

relative frequency distribution

Answer 1

describes the fraction of occurrences of each value of a variable

Question 2

bar graph

Answer 2

usesthe height of rectangular bars to display the frequency distribution (or relative frequency distribution) ofa categorical variable

Question 3

histogram

Answer 3

uses the area of rectangular bars to display the frequency distribution (or relative frequency distribution) of a numerical variable

Question 4

mode

Answer 4

the interval corresponding to the highest peak in the frequency distribution

Question 5

skew

Answer 5

refers to asymmetry inthe shape of a frequency distribution for a numerical variable

Question 6

outlier

Answer 6

is an observation well outside the range of values of other observations in the data set

Question 7

percentile of a measurement

Answer 7

specifies the percentage of observations less than or equal to it

Question 8

cumulative relative frequency at a given measurement

Answer 8

the fraction of observations less than or equal to that measurement

Question 9

contingency table

Answer 9

gives the frequency of occurence of all combinations of two (or more) categorical variables

Question 10

grouped bar graph

Answer 10

uses the height of rectangular bars to display the frequency distributions of two or more categorical variables

Question 11

mosaic plot

Answer 11

uses the rectangles to display therelative frequency of occurrence of all combinations of two categorical variables

Question 12

scatter plot

Answer 12

graphical display of two numerical variables in which each observation is represented as a point on a graph with two axes

Question 13

line graph

Answer 13

uses dotsconnected by line segments to display trends in a measurement over time or other ordered series