Percent Error & How Fair are Games of Chance?

Today we met all together, since MaryBeth and Cory are finished for the year. Tomorrow will be the last 7th grade math class.

Students shared their homework. A number of students did not complete the Roller Coaster homework--it can be found here. If you did not finish the homework, please do it tonight and turn it in tomorrow.

Then we discussed Percent Error, and how it can help you determine how good your estimate is. We found that the closer to 0 the percent error is, the better the estimate. Errors can actually be more than 100% if your estimate was more than twice the actual number.

Students also shared their probability homework from yesterday with others who did the same homework. Then we played two games: the Two Dice Sum Game and the Multiplication Game. Both are games played with two people and a pair of dice. In both cases, we compared the experimental probability (the number of times you win out of the number of times you played) to the theoretical probability (the number of favorable outcomes to the number of total possible outcomes). We discussed the likelihood that the sums would be even or odd in the Two Dice Sum Game, and wondered about the likelihood that the products would be even or odd in the Multiplication Game, to figure out whether it was fair or not. Problem 1.3, Playing the Multiplication Game, can be found here, and class notes may be downloaded for class 7A or class 7B. We will continue working on this game tomorrow.

LARGE GROUP HOMEWORK
Ace 1.3 handout which can be downloaded here
Problems 11-12, 25-26, and 30-31

Due tomorrow, Wednesday, June 9.

SMALL GROUP HOMEWORK
Ace 1.1 handout which can be downloaded here
Problems 1-2

Due tomorrow, Wednesday, June 9.