In this activity students learn to use estimation to determine the number of candies in various size cylinders. They compare estimated numbers to actual numbers and investigate the relationship between the two numbers.

Before the Activity

Link calculators using TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable

See the attached PDF file for detailed instructions for this activity

Print pages 1 - 7 from the attached PDF file for your class

During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

Estimate the number of candies in each vial

Count the actual number of candies in each vial

Enter the data of the estimated value and the actual value of candies for each vial

Find the difference between estimated and actual numbers of candies for each vial

Calculate the mean of the diference between actual and exact numbers and determine the average number by which the estimate was off

Find the percentage by which estimate was off for each vial and find the mean of this data

Enter the averages of the number by which the estimate was off for the entire class

Sort them in ascending order

Find the mean, median and mode for the averages

Set up a statistics plot and create a box-and-wiskers plot

Compare the estimated numbers to the actual numbers using a scatter plot

Manually fit the data to a straight line and find the equation of the line

Compare the plots of the lowest average value and the highest average value

After the Activity

Students will complete the Worksheet and analyze the results.

Review student results:

As a class, discuss questions that appeared to be more challenging