Chapter 2
Categorical frequency distribution
30 students recorded the colors of their eyes, choosing from the colors brown, blue, green, hazel, and black. This data can be appropriately summarized in a _________.
True
A Pareto chart arranges data from smallest according to frequencies
False
A Pareto chart is useful for showing percentages of the total
Time series graph
A ___ would most appropriately represent the number of students that were enrolled in statistics for the past ten years
True
A frequency polygon and a histogram have the same overall shape
False
A histogram uses the midpoints for the x values and the frequencies for the classes in a frequency distribution
False
A pie graph is useful to show the trend of the data over time
True
A pie graph was created showing the number of children per family. If 234 families were in the survey and the section depicting families with 3 children represented 120 degrees, the number of families with 3 children was 78
False
A pie graph would best represent the number of inches of rain that has fallen in Ohio each day for the past 2 months
True
A stem and leaf plot is useful for keeping more precision than a grouped frequency distribution.
True
A time series graph is useful for representing the frequencies of a data category over a period of several years
True
A time series graph represents data that occur over a specific period
Times series graph
A weatherman records the amount of rain that has fallen in Portland, Oregon during each day. What type of graph should he use?
80%
An automobile dealer wants to construct a pie graph to represent types of cars sold in July. He sold 72 cars; 16 of which were convertibles. The convertibles will represent how many degrees in the circle
False
An ogive and a frequency polygon have the same overall shape
True
An ogive graph is also called a cumulative frequency graph
Misleading graph
Exaggerating a one-dimensional increase by showing it in two dimensions is an example of a
90
Find the class with the least number of data values
False
For the class 16.3-23.8, the width is 7.
25
Given the following frequency distribution, how many pieces of data were less than 28.5?
True
Graphs give a visual representation that enables readers to analyze and interpret data more easily than they could simply by looking at numbers
?
Greg wants to construct a frequency distribution for the political affiliation of the employees at Owen's Hardware Store. What type of distribution should he use
15
If a frequency distribution had class boundaries of 132.5-147.5, what would be the class width?
Skewed distribution
If data is clustered at one end or the other, it indicates that there is a ____.
True
If the limits for a class were 20-38, the boundaries would be 19.5-38.5.
120%
Karen is constructing a pie graph to represent the number of hours her classmates do homework each day. She found that 8/24 did homework for three hours each day. In her pie graph, this would represent how many degrees
False
On a Pareto chart the frequencies are arranged from the lowest and highest
?
Pareto chart have units that are used for the frequency that are ___ in size
True
The LOWER CLASS LIMIT represents the smallest data value that can be included in the class. True or False
True
The cumulative frequency is the sum of the frequencies accumulated to the upper boundary of a class in the distribution
True
The frequency polygon is a graph that displays the data by using lines that connect points plotted for the frequencies at the midpoints of the classes
?
The range 32.17-34.63 is not a good choice for class boundaries because __________.
Frequency polygon
The three most commonly used graphs in research are the histogram, the ______, and the cumulative frequency graph (ogive).
?
The total frequency of the data whose ogive shown below is approximately ___.
1.065-3.435
What are boundaries of the class 1.87-3.43
2.5-15.5
What are the boundaries of the class 3-15
-6
What is the lower class limit in the class -6-9
13
What is the lower class limit in the class 13-17
10
What is the midpoint of the class 4-16
15.4
What is the midpoint of the classes 13.5-17.3
Pareto
What type of graph is the figure below
17.5-18.5
What would be boundaries on the average age for high school graduates if they were reported to be 18 years old
False
When constructing a frequency distribution the class width should be an even number. True or False
Raw Data
When data are collected in original form, they are called ______.
Grouped
When the range is the large and classes that are several units in width are needed, a ____ frequency distribution is used.
True
When two sets of data are compared on the same graph using two lines, it is called a compound time series graph
Pareto chart
Which graph should be used to represent the frequencies that certain types of classes are taken at Highlands Middle School
Histogram
Which type of graph represents the data by using vertical bars of various heights to indicate frequencies
True
A grouped frequency distribution is used when the range of the data values is relatively small. True or False
False
A histogram is a graph that represents the cumulative frequencies for the classes in a frequency distribution
True
A time series graph is useful for detecting long term trends over a period of time
60
Find the class with the greatest number of data values
19
For the class 7-19, the upper class limit is
120%
In a pie graph, if pepperoni pizza were 24/72 of the distribution, how many degrees would be needed to represent pepperoni
Frequency
The _____ is the number of values in a specific class of distribution.
Class Midpoint
The ______ is obtained by first adding the lower and upper limits and then dividing by 2.
Relative frequency graphs
The graphs that have their distribution as proportions instead of raw data as frequencies are called ____.
Pie
The percentage of white, wheat, and rye bread sold at a supermarket each week is best shown using a ____ graph
?
The total frequency of the data whose histogram is shown below is approximately
35
Using the class 23-35, what is the upper class boundary