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Project Grant Team
John S. Pazdar Patricia L. Hirschy Project Director Principal Investigator Capital Comm-Tech College Asnuntuck Comm-Tech College Hartford, Connecticut Enfield, Connecticut
This project was supported, in part, by the Peter A. Wursthorn National Science Foundation Principal Investigator Opinions expressed are those of the authors Capital Comm-Tech College and not necessarily those of the Foundation Hartford, Connecticut
NASA - AMATYC - NSF
SPINOFFS
Spinoffs are relatively short learning modules inspired by the LTAs. They can be easily
implemented to support student learning in courses ranging from prealgebra through calculus.
The Spinoffs typically give students an opportunity to use mathematics in a real world context.
LTA - SPINOFF 9A Descriptive Statistics for Shuttle Data
LTA - SPINOFF 9B Standard Deviations of Time Spent in the OPFs
LTA - SPINOFF 9C Scatterplots and Regression Lines with the TI-92™
Marcella Laddon - AMATYC Writing Team Member
Monterey Peninsula College, Monterey, California
Janet Tarjan - AMATYC Writing Team Member
Bakersfield Community College, Bakersfield, California
Amanda Mitskevich - NASA Scientist/Engineer
Kennedy Space center, Florida
SPINOFF 9C
Scatterplots and Regression Lines with the TI-92™
Is the length of time required in the OPF related to the mission in days? You will answer this question by doing the following exercises. Use the information in Table 9C located on the last page of this Spinoff to complete the exercises.
Exercise 1: Follow the steps below to draw a scatterplot with the mission duration on the x-axis and the time spent in the OPF on the y-axis. Is there a pattern to the points? Describe any pattern you observe.
Preliminaries:
The keys that you will press are in boldface.
- In sequence, Press ON , the green diamond key, and HOME (the Q key) to assure that you start with the home screen.
- Press MODE. On the first line (Graph .......), a blinking cursor will highlight a word. Press the right side of the blue cursor pad (thumb button) to see the choices. Select “1:FUNCTION” by highlighting it and pressing ENTER or by pressing 1.
- Press the bottom of the blue cursor pad to move down in the menu until you reach “AUTO”, “EXACT” or “APPROXIMATE”. Push the right side of the blue cursor pad to see three choices. Select “Approximate”, and hit ENTER twice to get back to the home screen.
- Now we'll clear out any functions or plots that may be entered in the Y= editor. Press the green diamond key followed by Y= (the W key). If there are any functions entered, select them and press CLEAR to remove them from memory. Use the blue cursor pad to move up on the screen to check for plots. If there are any plots, highlight them and press CLEAR.
Entering the Data:
- Press APPS to access applications. Move cursor to Data/Matrix Editor, press the right side of the blue cursor pad to see choices, highlight “NEW”, and press ENTER.
- The cursor will be on the first line of the “NEW” menu. Press the right side of the blue cursor pad to see the choices. Select “Data” by highlighting it and pressing ENTER or by pressing 1.
- Move the cursor down to the “Variable:” box, type in OPF1, and hit ENTER. This names the data file for future access. Press ENTER again, and a data table pops up with your cursor at row 1, column 1.
Now enter the data from Table 9C into the TI-92's™ data table. Enter the duration times (x values) in column c1 and the time spent in the OPF (y values) in column c2. After typing in a value of the data, press ENTER. Continue this process until you've entered all 150 entries from Table 9C. You may use the blue cursor pad to navigate anywhere in the data table. If you enter a wrong number, you can correct the error by using the CLEAR key. (One person may enter all the data and then share it with others using the TI-92™ cable and link feature!)
Please note that if you mistakenly exit the data table, you can retrieve it by hitting the 2nd key followed by ESC (QUIT). This takes you to the home screen. At this point you may hit the APPS key, select “Data/matrix Editor” and now “Current”. This will take you back into editor mode in the data table.
NASA - AMATYC - NSF
Table 9C
Flight #
Mission Duration (days)
Time Spent in OPF (days)
Flight #
Mission Duration (days)
Time Spent in OPF (days)
Flight #
Mission Duration (days)
Time Spent in OPF (days)
NASA - AMATYC - NSF
