CensusAtSchool » Sampling

Cleaning data

Pip — Mon, 06 Sep 2010 21:59:56 +0000

In this activity students are given some background information about cleaning data and why it is important. They then undertake to clean data they are given themselves.

Helpful links:

From CensusAtSchool UK

http://www.censusatschool.org.uk/resources/data-handling/118-cleaning-up-your-data

To tag or not to tag?

Joanne Woodward — Fri, 13 Jun 2008 00:27:51 +0000

It’s lunchtime and Jackson is looking forward to running around. Jackson made a quick survey of the friends he sits with while eating lunch to find out who wanted to play a game of tag with him. Jerry, Hemi and Tony were keen to join in. Daniel and Leo said they wanted to sit and play with their latest computer game. Harrison wanted to stand around and talk to some other friends. Based on his quick survey 4 out 7 (57%) of his group wanted to run around and play tag.

Jackson wonders whether 57% of New Zealand students ran around at lunchtime. Harrison thinks that Jackson’s quick survey is flawed if he wants information on all NZ students.

What proportion of all NZ students do each of the different activities at lunchtime?

8 Glasses per Day?

Joanne Woodward — Thu, 12 Jun 2008 04:14:30 +0000

Do you drink 8 glasses of water per day? This is the recommended number of glasses of water we should drink each day.

Do New Zealand students drink water regularly? Can you predict what a graph of a sample of students will look like?

Armspans

Julia Horring — Tue, 10 Jun 2008 23:05:51 +0000

Are the armspan lengths of 12-year-old boys and girls the same or different?