Lesson 1 3 Introducing the Mean Learning Targets
- Slides: 11
Lesson 1 -3 Introducing the Mean
Learning Targets I can find the mean and median for data sets.
Definitions Define the following words in your math journal: Average Mean
Math Message Read the top of page 9 in your journal. Compare Maria’s and Jalen’s strategies in the Math Message.
Math Message Follow Up What do we know from looking at the graph? It is a picture graph with circles representing $2 each and half-circles representing $1 each You can tell how much each person spent on lunch It shows who spent the most and who spent the least on lunch You can find the total everyone spent on lunch all together Let’s compare your explanations for splitting the bill? What do the two strategies have in common?
When we find how much each person pays if they all pay the same amount is called finding the average, or mean, cost person. Which person found the mean of the lunch bill?
Making Predictions Using the Mean Box of Raisins Guess how many raisins are in your box before opening them. Record your guess on journal page 9. Open your box of raisins and without taking any out estimate how many raisins are in the box. Record What this estimation on journal page 9. is the difference between your guesses and estimates?
Making Predictions Using the Mean Count out your raisins Record your actual total and the totals of each group member in the chart on journal page 9. As a group predict the number of raisins that would be in a typical ½ ounce box of raisins.
Discussion How might Maria’s strategy of “evening out” to make equal shares help them predict? How might they use Jalen’s method of dividing a total to predict? What would you do if you had a remainder when using Jalen’s method?
Group Mean Let’s record the class data… Why do you think there is variation from group to group? What might lead groups to make different predictions? How could we use the class data to predict the typical number of raisins in a box?
With a partner… Finish journal page 9 Complete worksheet page 12 Homework: Study Link 1 -3