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BusStats2Ce Ppt Ch04

 BusStats2Ce Ppt Ch04 Essay

Chapter 4

Displaying and Describing

Categorical Data

Copyright laws © 2014 Pearson Canada Inc.

Chapter 4 – Slide 1

Ch. four: Displaying and Describing

Specific Data

Learning Objectives

•Use a bar or pie chart correctly

•Analyze uniformity tables

Copyright laws © 2014 Pearson Canada Inc.

Section 4 – Slide a couple of

4. 1 The Three Rules of Data Examination

Rules you, 2, and 3: Generate a picture

Photographs …

• reveal items that cannot be seen in a table of numbers • show important features and patterns inside the data

• provide an exceptional means to statement findings in front of large audiences

Copyright © 2014 Pearson Canada Incorporation.

Chapter four – Go 3

4. 2 Rate of recurrence Tables

A frequency stand organizes info by saving counts and

category brands as in the table below

The names of the categories labeled each line in the

regularity table

If the number of groups gets too large, values might

be lumped together within an " Other” category

Copyright laws © 2014 Pearson Canada Inc.

Chapter 4 – Slide 5

4. a couple of Frequency Furniture

A relative frequency table shows the dimensions or

percentages that sit in every single category as opposed to the

counts. (See the desk below. )

The percentage of the data in each category is found simply by

dividing the count in every category by total number of

cases and multiplying by 100.

Copyright © 2014 Pearson Canada Inc.

Phase 4 – Slide 5

4. three or more Charts

The region Principle

Even though the height of every column corresponds to the

right relative rate of recurrence of Loblaw stores, our eyes are likely to be impressed by the area, that can be misleading.

Copyright laws © 2014 Pearson Canada Inc.

Part 4 – Slide six

4. 3 Charts

The location Principle

The very best data displays observe the place principle: the area

occupied by a part of the chart should match the

size of the value it signifies.

Copyright © 2014 Pearson Canada Inc.

Chapter some – Go 7

four. 3 Graphs

Bar Chart

A club chart exhibits the syndication of a particular variable, showing the matters for each category next to each other for

convenient comparison.

The bar graph right here

gives a better

visual impression of the

store data.

Copyright © 2014 Pearson Canada Inc.

Phase 4 – Slide eight

4. a few Charts

Pub Charts

Pub charts are usually drawn in straight columns, although

they can end up being drawn with horizontal pubs.

Copyright © 2014 Pearson Canada Incorporation.

Chapter four – Glide 9

some. 3 Charts

Pie Graphs

Pie charts show the complete group like a circle (" pie”) sliced into bits.

The size of every single piece is definitely proportional to the fraction of the entire in every category. The pie graph and or chart for Loblaw data is definitely

displayed beneath.

Copyright © 2014 Pearson Canada Incorporation.

Chapter 4 – Go 10

4. 3 Chart

Before making a bar graph or cake chart, …

• For pie graphs or comparable frequency bar charts be sure everything results in 100% (e. g. fully of Loblaw stores in

Canada)

• Be sure the categories don't overlap (e. g. There isn't a Loblaw retail outlet that is in both the " Ontario” category and the " Other” category)

• Considercarefully what you are attempting to communicate regarding

the data

Copyright © 2014 Pearson Canada Inc.

Part 4 – Slide 14

4. 4 Contingency Furniture

A A contingency Table displays how the beliefs of one variable is

dependant on the benefit of one other variable.

Example: Data was collected around the strength of consumer

personal preferences for regional foods in their country. The info is exhibited in equally a consistency table and a quiche chart.

Copyright laws © 2014 Pearson Canada Inc.

Part 4 – Slide doze

4. some Contingency Desks

To show just how opinions in regional foods varied simply by countries,

we are able to display the information in a a contingency table.

We now have added greater detail by adding the countries as fresh

variable.

Copyright laws © 2014 Pearson Canada Inc.

Section 4 – Slide 13

4. 4 Contingency Furniture

The minor distribution of your variable within a contingency desk is the total count that occurs when the value of that variable is definitely held continuous.

Here the marginal division shows the...

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