Below are 2 examples of Bar Charts.

Let's compare Histograms and Bar charts...

- What difference do you observe?
- When do you use a bar chart and when would you use a histogram?

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## Self-Directed Learning (I)

## when we meet... in Term 3

## Term 3 Week 3 Maths Test

## Topics

## Announcement: Self-Directed Learning Modules

## Useful Links

## Maths - General Links

## Resources and Video Clips about NUMBERS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Safety In Numbers** Mathematician Marcus du Sautoy reveals how the language of maths is used to construct the complex codes that we encounter in everyday life. Learn about the amazing use of PRIME NUMBERS in our everyday life.

(http://www.teachers.tv/video/3501)

**Zero to Infinity **In this programme, mathematician Marcus du Sautoy explains how humans have developed numbers for their mathematical needs. Hear about the Invention of **Zero** and have a better understanding of **Infinity**. Can we divide a number by Zero? Is *Infinity* the biggest number? (http://www.teachers.tv/video/3500)

*Source: The Guardian (Guardian.co.uk), 4 March 2005 *

Article:**The Magic Number** by Simon Singh

Found!!! The biggest**Prime Number** yet...

Click HERE to read article.

## Resources and Video Clips about FRACTIONS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Cutting a Cake** Have you wondered how to divide a cake into 12 pieces using only 4 cuts?

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

**Putting Reciprocals into Practical Use** Reciprocals help us to order "difficult" fractions! (http://www.teachers.tv/video/43452)

## Resources and Video Clips about GEOMETRY

## Video Clips about Data Handling

## Co-Authors

Year 2010

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ODD week

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

The following topics will be covered in the Maths Test

Chapter 4: Introduction to Algebra

Chapter 5: Algebraic Manipulation

Chapter 9: Ratio, Rate and Speed

Chapter 16: Data Handling (including Mean, Median, Mode)

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This term, we have earmarked 2 sub-topics for you to learn on your own... own time own target (to be completed by Term 1 Week 9).

**Chapter 9.2: Average Speed **

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

**Chapter 9.3: Speed**

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

**As these 2 sub-topics are not going to be covered in the class, please check/clarify with Ms Loh (Face-to-face or virtually) when you are in-doubt.**

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

(http://www.teachers.tv/video/3501)

Article:

Found!!! The biggest

Click HERE to read article.

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

Source: Teacher.TV (http://www.teachers.tv/)

**Seaside Triangles** - How properties of triangles become useful in real world applications.

(http://www.teachers.tv/video/37910)

**Surface Area of an Octagon** - Step-by-step process of working out the area of an octagon

(http://www.teachers.tv/video/43382)

(http://www.teachers.tv/video/37910)

(http://www.teachers.tv/video/43382)

This video clip, Statistics: Decisions Through Data shows how data (in the study of Statistics) has enabled mankind to make big and small decisions, that either impact the individuals or the bigger community.

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

*Source: The Futures Channel (**http://www.thefutureschannel.com/index.php**)*. Note: It may take a while to stream the video clip

*This video about...* There are more than 350 different commodities grown in California. In a state that provides approximately 15 percent of U.S. agricultural products, statistics are an important tool for agricultural economists to keep up with supply and demand. Let's hear how the statistics help farmers to make decisions!

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

I would use histograms when my x axis has to be numbers and not words

ReplyDeleteI would use histograms when i have to use frequency

I use a bar chart when I need words on the x axis.

ReplyDeleteI use a histogram when I need numbers on the x axis.

I also use a histogram to save paper! Haha

Histogram is used to present frequency counts or relative frequencies of the data, when the frequency of occurrence is important.

ReplyDeleteBar Graph is used to discrete data like how many types of vehicles were made in a year.

I observe that the frequency count is on the y-axis and cannot be written horizontally while bar charts can be written horizontally. I would use a histogram when there is frequencies

ReplyDeleteHistograms are used for giving a comparison between frequencies. Bar graphs are used for comparing time and the amount of a object.

ReplyDeleteI use a histogram when I am calculating frequency. I use a bar chart when I am counting the number of things at different times

a histogram has small frequencies where as the bar graph can range from big values to small values.

ReplyDeleteThe main question a histogram answers is: "How many measurements are there in each of the classes of measurements?" The main question a bar graph answers is: "What is the measurement for each item?"(retrieved from: http://www.shodor.org/interactivate/discussions/HistogramsVsBarGraph/ on 4 may at 7.50pm)

HIstograms are used for when we need to use our frequency tables. Bar graphs are used to count different things at the same time.

ReplyDeleteI will use a histogram when I have frequency tables. I will use a bar chart when I am counting or comparing different things at the same time.

Histograms are used to illustrate continuous data while bar charts are used to describe distinct categories. Histograms are also used when numbers are on the X axis.

ReplyDeleteWhat difference do you observe?

ReplyDeleteWhen do you use a bar chart and when would you use a histogram?

Histogram is usually used to show frequency but for pie chart, it can be used to show a variety of data. So I will use histogram to show frequency & pie chart for other data.

A histogram is a vertical bar with no space in between the bars.

ReplyDeleteI will use a histogram when I need an alternative method of showing data apart from frequency tables.

I will use a bar chart I am displaying data which needs comparison.

We use bar charts when we want to present something in a categorical method, e.g Y axis-income per month, X axis-companies, e.g ABC Company, XYZ Company.

ReplyDeleteWe use histograms when we want to present something in a quantitative way, example: Y axis-income per month, X axis-range of age group, e.g 40-45, 45-50.

We can use bar charts when there are specific distinctive categories which requires quantities to be showed.

ReplyDeleteWe can use histograms when we need to present data where by the categories are in a range, it is used to plot frequency's as well.

Histograms are used when you want to show the frequency. Bar charts are more for comparison.

ReplyDeleteWhat difference do you observe?

ReplyDeleteboth the x and y axis in histograms are represented by numbers and the bars are stuck together. in bar graphs, the bars have equal spacing and the axis can sometimes be represented by groups (words).

When do you use a bar chart and when would you use a histogram?

Bar charts are used to compare the different things like different companies or classes. histograms are use to compare the different "parts" of the same thing like people of a class...

IM TOTALLY CLUELESS. ><''

The frequency count is always on the horizontal axis.

ReplyDeleteHistograms are used to summarize discrete or continuous data that are measured on an interval scale. Bar graphs are used when i need to compare different objects or values at the same time.

Bar charts are for showing comparison between number of different things or objects, while histograms are more like for finding the frequency.

ReplyDeleteHistograms do not have spacings between the bars while bar charts have equal spacings between bars.

ReplyDeleteI would use a bar chart for showing relationship between pieces of data such as the pupil enrollment of schools in different cities. Histograms only show the frequencies of certain objects or people.