Welcome to my math blog! The purpose of this blog is to help you stay informed about our learning and experiences that have taken place during our math class. I have also included links your child (and you) may want to use in order to supplement math learning in 5th grade.

## Thursday, December 19, 2013

### Twelve Days of Christmas: Experimental Probability (5th Grade)

Twelve Days of Christmas

Today we combined the data from all three class to find our total experimental probability.  I explained that the more data we gather the more accurate our percentages will be.  Instead of looking at just 100 pulls, we are now looking at the data from 300 pulls.  We just the following spreadsheet:

First, we determined our fraction, then we used calculators to find the decimal, and then converted our decimal into a percentage.  As we worked, we were comparing our data to the theoretical data (what SHOULD have happened).  If it was exact, we circled it.  If it was a 1% difference, we placed a check mark.  If it was more than a 1% difference, we placed an 'x'.

As you can see, we had two pieces of data that were exact.  We had 6 more pieces that were a 1% difference, and only 2 that were more than a 1% difference!  We discussed our data and drew a few conclusions:
1. Our experimental data as a 5th grade was much closer to the theoretical data.
2. If we had a fourth classroom in 5th grade and were able to add another set of data our experimental data would probably be even more closely related to the theoretical data.
The kids did a final circle graph.  Then they were asked to compare the 5th Grade Experimental Data Graph to the Theoretical Data Graph and describe an observation.

HOMEWORK:  None!

This will be my last post until January 6.