Working together to improve teaching & learning Leagan Gaeilge
›› Geogebra ›› Understanding a 95% confidence interval
1. Click on Show Population Proportion to show or hide the population proportion. 2. Type a sample proportion e.g. 0.24 into Single Sample Proportion and press Enter and the sample proportion will be displayed. 3. Repeat Step 2 until you have all the classes sample proportions entered (up to a maximum of 35). 4. Click on Show 95% Confidence Interval to show or hide the 95% confidence intervals for each of the sample proportions. 5. Drag the blue slider to the right to show other sample proportions. 6. Ctrl+R will recompute a different set of sample proportions (but will keep the ones you typed in). 7. Reset will replace the sample proportions you typed in with sample proportions generated by the file.

Copyright: Project Maths Development Team 2014