Operation Manual

Chapter 12: Statistics 183
Chapter 12:
Statistics
Getting Started: Pendulum Lengths and Periods
Getting Started is a fast-paced introduction. Read the chapter for details.
A group of students is attempting to determine the mathematical relationship between the length of a
pendulum and its period (one complete swing of a pendulum). The group makes a simple pendulum
from string and washers and then suspends it from the ceiling. They record the pendulum’s period for
each of 12 string lengths.*
*This example is quoted and adapted from Contemporary Precalculus Through
Applications, by the
North Carolina School of Science and Mathematics, by permission of Janson Publications, Inc., Dedham,
MA. 1-800-322-MATH. © 1992. All rights reserved.
Length (cm) Time (sec) Length (cm) Time (sec)
6.5 0.5124.41.01
11.0 0.68 26.6 1.08
13.2 0.73 30.5 1.13
15.0 0.79 34.3 1.26
18.0 0.88 37.6 1.28
23.1 0.99 41.5 1.32
1. Press z † † † Í to set
Func graphing mode.
2. Press …
5 to select 5:SetUpEditor. SetUpEditor is
pasted to the home screen.
Press Í. This removes lists from view in the stat list
editor columns 1 through 20, and then stores lists
L1
through L6 in columns 1 through 6.
Note: Removing lists from the stat list editor does not
delete them from memory.
3. Press …
1 to select 1:Edit from the STAT EDIT menu.
The stat list editor is displayed. If elements are stored in
L1 and L2, press } to move the cursor onto L1, and then
press ‘ Í ~ } ‘ Í to clear both lists.
Press | to move the rectangular cursor back to the first
row in
L1.
4. Press 6 Ë 5 Í to store the first pendulum string
length (6.5 cm) in
L1. The rectangular cursor moves to
the next row. Repeat this step to enter each of the 12
string length values in the table.