Exam 2: Descriptive Statistics: Tabular and Graphical Displays

Exhibit 2-1 The number of hours worked per week) by 400 statistics students are shown below. Number of Hours Frequency 0-9 20 10-19 80 20-29 200 30-39 100 -Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less

The frequency distribution below was constructed from data collected from a group of 25 students. Height in Inches) Frequency 58-63 3 64-69 5 70-75 2 76-81 6 82-87 4 88-93 3 94-99 2 a. Construct a relative frequency distribution. b. Construct a cumulative frequency distribution. c. Construct a cumulative relative frequency distribution.

A set of visual displays that organizes and presents information that is used to monitor the performance of a company or organization in a manner that is easy to read, understand, and interpret.

The relative frequency of a class is computed by

Exhibit 2-1 The number of hours worked per week) by 400 statistics students are shown below. Number of Hours Frequency 0-9 20 10-19 80 20-29 200 30-39 100 -Refer to Exhibit 2-1. The number of students who work 19 hours or less is

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical devices) which can be used to present these data is are)

When a histogram has a longer tail to the right, it is said to be

You are given the following data on the ages of employees at a company. Construct a stem-and-leaf display. 26 32 28 45 58 52 44 36 42 27 41 53 55 48 32 42 44 40 36 37

In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as

An Ogive is constructed by plotting a point corresponding to the frequency of each class.

A frequency distribution is a tabular summary of data showing the

The sum of the percent frequencies for all classes will always equal

A tabular method that can be used to summarize the data on two variables simultaneously is called

The following data set shows the number of hours of sick leave that some of the employees of Bastien's, Inc. have taken during the first quarter of the year rounded to the nearest hour). 19 22 27 24 28 12 23 47 11 55 25 42 36 25 34 16 45 49 12 20 28 29 21 10 59 39 48 32 40 31 a. Develop a frequency distribution for the above data. Let the width of your classes be 10 units and start your first class as 10 - 19.) b. Develop a relative frequency distribution and a percent frequency distribution for the data. c. Develop a cumulative frequency distribution. d. 22 d. How many employees have taken less than 40 hours of sick leave?

In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to

The sales record of a real estate company for the month of May shows the following house prices rounded to the nearest $1,000). Values are in thousands of dollars. 105 55 45 85 75 30 60 75 79 95 a. Develop a frequency distribution and a percent frequency distribution for the house prices. Use 5 classes and have your first class be 20 - 39.) b. Develop a cumulative frequency and a cumulative percent frequency distribution for the above data. c. 70% c. What percentage of the houses sold at a price below $80,000?

A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent

A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. Undergraduate Major Graduate Schaol Business Engineering Others Total Yes 35 42 63 140 No 91 104 65 260 Total 126 146 128 400 a. Are a majority of the seniors in the survey planning to attend graduate school? b. Which discipline constitutes the majority of the individuals in the survey? c. Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school. d. Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major.