|Introducing CensusAtSchool||Former Australian Statistician, Dennis Trewin, talks about the aims of CensusAtSchool and the structure of the project.||02:12|
|Tailoring the Data to Suit Your Needs|
|Making Multiple Worksheets in a Workbook||Insert a new sheet into an Excel workbook.||00:54|
|Simplify the Data||Copy and paste data from an existing worksheet into a new worksheet.||04:12|
|Working with Data in Microsoft Excel|
|Create a Summary Table||Format a table used to summarise data.|
|COUNTIF Function||Use COUNTIF to tally the frequency of a variable.|
|Draw a Graph||Insert and format a graph using categorical data.|
|Using the Sort Function||Sort data according to topic and value.|
|Mean and Median Function||Find the mean and median of numerical data.|
Mean and Median Function
The mean is one measure we can use to compare one data sample with another. In Excel mean is referred to as average. Before we can compare the questionnaire completion time of males and females in our data sample lets’ create a quick summary table to help organise our findings.
Select cell In D1 and enter the heading Question Time for Boys and Girls. In cell E2 Type, Mean, and in the cell immediately to the right, Median. In cell D3 type, Boys, and directly under this, Girls.
Select all the cells and the ones that will eventually hold data go to format, select cells click outside and inside and click on OK. Our table is ready. We are now ready to use the excel functions to analyse our data.
To find the MEAN, click in the cell we want the mean time for boys to appear. Click on insert, select function. A window called Insert Function should appear. Type mean, in the search for a function box and press go. Select AVERAGE and press OK. Click on the first QTime piece of data for males and Hold mouse down and drag down to last male Q time. Release the button and click on OK. The time it took for boys to complete the questionnaire should now appear in the cell. Repeat this for girls. Remember to place your cursor where you want your answer to go first.
We use the same process; Insert Function, to calculate the Median. However this time we type Median in the Search for a Function box. We can make the Mean time one decimal place by selecting the cells. Click on the format menu. Select cells. Under the category heading of Number, change the number of decimal places to 1. Press OK. We can now examine our question: Are boys faster than girls?
Imagine the debate about statistics that could arise if each student had taken their own sample and came up with a different answer. Why is the mean greater than the median for boys? What if the slowest boy was not there on the day? What if he were very much slower? Can you alter the data in any way to make the median 20? What can you do to make the median greater than the mean?
Many open ended questions can be asked to explore mean and median that would deepen students understanding. This is one example of how Excel can be used as an interactive learning tool. Change the data and see the effect immediately in the table.
With these basic skills you can now use excel to explore the many possibilities of CensusAtSchool data. You could further explore chart wizard function or experiment with other functions and statistical tools available in Excel.
|Using CensusAtSchool in the Classroom||Construct a scatterplot, remove outliers, add a trend line and remove outliers; and identify possible outliers using conditional formatting.
|Using ABS Census Data Products|
|Introductory Video for Census Topics||Introduction to the Census topics as well as what is not included in the Census product videos.|
|Census Product - QuickStats||This video demonstrates how you can search for key summary Census data using QuickStats.|
|Census Product - Community Profiles||This video demonstrates how to find Census data for your area of interest using Community Profiles.|
|Census Product - Census Tables||This video demonstrates how to find detailed Census data for your area of interest and how to download a Census table.|
|Key ABS Products for Teachers|
|Australian Social Trends||A description of some of the main features of the Australian Social Trends publication and where to find it on the ABS website.|
|Measures of Australia's Progress||How to find the Measures of Australia's Progress publication and a brief demonstration of key features.|
|Yearbook Australia||How to find the Yearbook Australia series and a brief demonstration of key features.|
|Consumer Price Index||How to find Consumer Price Index (CPI) on the website and a demonstration of how to access CPI education resources from the ABS Education pages.|
|Key National Indicators||How to find Key National Indicators on the ABS website and a demonstration of how to access source publications.|
|National Accounts||A demonstration of the National Accounts themes page and how to find quarterly and annual GDP data.|