Department

Business

Course Code

SCMA*1000

Professor

Henk Brand

Lecture

2

Week 2: Business Statistics â€“ Chapter 2 Kevin Lu

Descriptive Statistics: Tabular & Graphical Displays

Frequency Distribution:

- Frequency distribution is a tabular summary of data showing the number (frequency) of

observations in each of several non-overlapping categories or classes.

- The objective is to provide insights about the data that cannot be quickly obtained by

looking only at the original data.

Relative Frequency:

- The relative frequency of a class is the fraction or proportion of the total number of data

items belonging to the class.

- A relative frequency distribution is a tabular summary of a set of data showing the

relative frequency for each class

Percent Frequency Distribution:

- The percent of a class is the relative frequency multiplied by 100.

- A percent frequency distribution is a tabular summary of a set of data showing the

percent frequency for each class.

Bar Chart:

- A bar chart is a graphical display for depicting qualitative data.

- On one axis (usually the horizontal axis), we specify the labels that are used for each of

the classes.

- A frequency, relative frequency, or percent frequency scale can be used for the other

axis (usually the vertical axis).

Pareto Diagram:

- In quality control, bar charts are used to identify the most important causes of

problems.

- When the bars are arranged in descending order of height from left to right (with the

most frequently occurring cause appearing first) the bar chart is called Pareto diagram.

Pie Chart:

- The pie chart is a commonly used graphical display for presenting relative frequency and

percent frequency distributions for categorical data.

Frequency Distribution Three Steps take to define a class:

1. Determine the number of non-overlapping classes

2. Determine the width of each class

3. Determine the class limits

find more resources at oneclass.com

find more resources at oneclass.com

Over 90% improved by at least one letter grade.

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah â€” University of Toronto

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim â€” University of Michigan

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna â€” University of Wisconsin

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne â€” University of California

Join OneClass

Access over 10 million pages of study

documents for 1.3 million courses.

Sign up

Join to view

OR

By registering, I agree to the
Terms
and
Privacy Policies

Already have an account?
Log in

Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.