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CO2 Concentration Data Analysis: Linear Regression vs. Exponential Curve, Study Guides, Projects, Research of Introduction to Business Management

Instructions for analyzing co2 concentration data obtained from a wheat stand in nasa's biomass production chamber. Students are guided to create a scatterplot, find the equation of the regression line and correlation coefficient, and compare it with an exponential curve. Part of a larger project supported by the national science foundation and amatyc.

Typology: Study Guides, Projects, Research

Pre 2010

Uploaded on 08/05/2009

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Project Grant Team
John S. Pazdar Peter A. Wursthorn
Project Director Principal Investigator
Capital Community College Capital Community College
Hartford, Connecticut Hartford, Connecticut
This project was supported, in part, by the Patricia L. Hirschy
National Science Foundation Principal Investigator
Opinions expressed are those of the authors Asnuntuck Community College
and not necessarily those of the Foundation Enfield, Connecticut
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 20A What’s the Equation?
LTA - SPINOFF 20B What’s My Curve?
Kathryn Kozak - AMATYC Writing Team Member
Coconino Community College, Flagstaff, Arizona
Marcella Laddon - AMATYC Writing Team Member
Monterey Peninsula College, Monterey, California
Thomas Dreschel - NASA Scientist/Engineer
Kennedy Space Center, Florida
Raymond Wheeler - NASA Scientist/Engineer
Kennedy Space Center, Florida
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Project Grant Team

John S. Pazdar Peter A. Wursthorn Project Director Principal Investigator Capital Community College Capital Community College Hartford, Connecticut Hartford, Connecticut

This project was supported, in part, by the Patricia L. Hirschy National Science Foundation Principal Investigator Opinions expressed are those of the authors Asnuntuck Community College and not necessarily those of the Foundation Enfield, Connecticut

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 20A What’s the Equation?

LTA - SPINOFF 20B What’s My Curve?

Kathryn Kozak - AMATYC Writing Team Member

Coconino Community College, Flagstaff, Arizona

Marcella Laddon - AMATYC Writing Team Member

Monterey Peninsula College, Monterey, California

Thomas Dreschel - NASA Scientist/Engineer

Kennedy Space Center, Florida

Raymond Wheeler - NASA Scientist/Engineer

Kennedy Space Center, Florida

NASA - AMATYC - NSF

  1. 23

SPINOFF 20B

What’s My Curve?

The following data was obtained over a 10 hour period from a stand of wheat plants in the Biomass

Production Chamber: Initially, during the first 0.8 hours, CO 2 was deliberately added to the chamber

and then shut off so that scientists could track the CO 2 “drawdown” from photosynthesis.

Carbon Dioxide Concentration (ppm) over Time (hours)

1

Time PPM Time PPM 0.2 850 5.2 875 0.4 850 5.4 750 0.6 1200 5.6 719 0.8 2375 5.8 672 1.0 2313 6.0 609 1.2 2250 6.2 578 1.4 2188 6.4 547 1.6 2125 6.6 469 1.8 2000 6.8 438 2.0 1938 7.0 406 2.2 1844 7.2 359 2.4 1750 7.4 312 2.6 1688 7.6 281 2.8 1625 7.8 250 3.0 1563 8.0 234 3.2 1500 8.2 219 3.4 1438 8.4 203 3.6 1344 8.6 188 3.8 1281 8.8 156 4.0 1219 9.0 172 4.2 1156 9.2 156 4.4 1094 9.4 156 4.6 1031 9.6 125 4.8 969 9.8 125 5.0 938 10.0 125

1) Use a graphing calculator or a spreadsheet to make a scatterplot of the data.

2. a) Use your calculator or computer to find the equation of the regression line (the “best

fitting” line ) and the value of the correlation coefficient, r, for this data.

b) Graph this line on the same coordinate system as the scatterplot.