Chapter 2 SmartBook

A grouping of qualitative data into classes showing the number of observations in each class

Which of the following best describes a frequency table? A grouping of data into classes that shows the fraction of observations in each class A grouping of qualitative data into classes showing the number of observations in each class A bar chart showing the number of observations A table showing the cycles per second of musical tones

The frequency of occurrence of a nominal variable.

Which of the following features is not part of a histogram? Adjacent bars whose height represents a number or fraction. Quantitative data divided into classes. The frequency of occurrence of a nominal variable. The frequency of occurrence of data within classes.

Frequency is plotted on the vertical axis and the class midpoint is plotted on the horizontal axis.

A frequency distribution table shows the number of observations for each class interval of data. How is this data plotted as a frequency polygon? The cumulative proportion of observations for each class is plotted on the vertical axis and the class upper limit is plotted on the horizontal axis. Frequency is plotted on the vertical axis and the class interval is plotted on the horizontal axis. Frequency is plotted on the horizontal axis and the class interval is plotted on the vertical axis. Frequency is plotted on the vertical axis and the class midpoint is plotted on the horizontal axis.

a histogram

A frequency polygon shows the shape of a distribution and is similar to: a bar chart a frequency table a histogram a pie chart

class midpoints

In a frequency polygon the points are plotted at the intersection of the class frequencies and the: upper limits of the classes class midpoints lower limits of the classes

There should be gaps between bars. Plotted rectangles should be the same width. Bar charts are used for qualitative data.

Select all that apply Which of the following are characteristics of bar charts? There should be gaps between bars. Plotted rectangles should be the same width. Bar charts are used for qualitative data. Plotted rectangles should be the same height.

State of residence of students in a business statistics course Majors of students in a business statistics course Gender of students in a business statistics course

Which of the following data can be represented as frequency tables? State of residence of students in a business statistics course Age of students in a business statistics course Majors of students in a business statistics course Gender of students in a business statistics course

Class frequencies The shape of the distribution Classes

Select all that apply Which of the following can be observed from a histogram? The relationship between two variables Class frequencies The shape of the distribution Classes

0.20

Suppose that the miles per gallon for 80 cars is summarized in a frequency distribution. Below is a part of the distribution. What would the relative frequency be for the class "20 up to 24?" MPG Frequency 16 up to 20 10 20 up to 24 16 80 16 0.20 10 1.00 0.125

The qualitative class labels.

What information is shown on the horizontal axis of a bar chart? The fraction of observations in each class The total number of observations The qualitative class labels. The number of observations in each class

counting the number of observations less than the upper limit of the class.

The value shown on the vertical axis of a cumulative frequency polygon for a particular class is found by: dividing the class frequency by the total number of observations. counting the number of observations within the class. counting the number of observations less than the upper limit of the class.

the fraction or percentage of observations in each class interval

A relative frequency distribution shows: the number of observations of a particular value in a set of data the number of observations in each class interval the fraction or percentage of observations in each class interval

It provides the tally for each class. Use classes and frequencies to organize data Organize raw data

Select all that apply Which of the following are characteristics of frequency distributions? It provides the tally for each class. Use classes and frequencies to organize data It shows all the observations in the data. Organize raw data

No observation can fit into more than one class. They can be used for qualitative data.

Select all that apply Which of the following are characteristics of frequency tables? No observation can fit into more than one class. They can be used for qualitative data. They can be used for quantitative data. An observation can fit into more than one class.

When the data is in its original form it is referred to as raw data Raw data can be either qualitative or quantitative

Select all that apply Which of the following are characteristics of raw data? Raw data has been organized into classes Only quantitative data can be classified as raw data When the data is in its original form it is referred to as raw data Raw data can be either qualitative or quantitative

It summarizes qualitative data.

Which one of the following is not a characteristic of a frequency distribution? It displays the number of observations in each class. It uses mutually exclusive classes. It uses collectively exhaustive classes. It summarizes qualitative data.

Raw data are simply a listing of data before summarizing it.

Which one of the following is true regarding raw data? Raw data are the tally of data in each class. Raw data refers to the form of the data after grouping has taken place. Raw data are simply a listing of data before summarizing it. Raw data are the result of dividing frequencies by the total number of observations.

The sum of the relative frequencies must be one (assuming no rounding errors).

Which of the following is a feature of a relative frequency distribution? The sum of the relative frequencies must be one (assuming no rounding errors). Relative frequencies are found by dividing the total number of observations by the class frequencies. The sum of the relative frequencies is equal to the total number of observations. Individual relative frequencies must be between -1 and +1.

It can show the total number of observations less than a particular class' upper limit.

Which of the following is an advantage of a cumulative frequency polygon over a histogram or frequency polygon? It shows class midpoints as points on points on a polygon, It can show the total number of observations less than a particular class' upper limit. It can show the number of observations in a given class.

The relative frequency is found by dividing the class frequencies by the total number of observations.

Which of the following operations is true regarding relative frequency distributions? The sum of the relative frequencies is equal to the number of observations. The sum of the relative frequencies must be less than 1. No two classes can have the same relative frequency. The relative frequency is found by dividing the class frequencies by the total number of observations.