This document contains instructions for an experiment to measure the time it takes for a varying number of students to complete a task of standing, clapping, and sitting. Students will take turns performing the task until all have participated, and the time to complete each round will be recorded. The number of students is the independent variable and time is the dependent variable. Data for groups of 3 to 24 students will be plotted on a graph and the best fit line drawn to analyze the correlation between more students and longer completion times.

1. Best Fit Lines Name_______________________
A. Stand/Clap
Design: First person stand and clap your hands above your head three times
then sit. Once the first person has completed the task the second person will
repeat the task. This will continue until the entire class has participated.
X (the independent variable): The number of students.
Y (the dependent variable): The time it takes to complete each round.
Students Time
3 ________
6 ________
9 ________
12 ________
15 ________
18 ________
21 ________
24 ________
Choose an appropriate scale and plot your data on the graph. Sketch the line
that best fits your data (a line that approximately goes through the middle of
your points)
1. What type of correlation does the scatterplot represent? ______________
2. Predict the amount of seconds it would take if we had 28 students. ______