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Lecture 4

BIOL 1000 Lecture Notes - Lecture 4: Pressure Measurement, Standard Deviation, Null HypothesisExam


Department
Biology
Course Code
BIOL 1000
Professor
Nicole Nivillac
Lecture
4

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Table 1. Statistical analysis of the aquatic plant Camboba caroliniana calculated by using the
photosynthetic rates (mL O2 produced/g/hour). In a manometric system, the experimental tubes
contained ~4g of the aquatic plant and some pond water and control tubes only contained pond
water. The experimental tubes (n=4) and control tubes (n=2) were under both white light and red
light for 16 minutes with 2 minute intervals where the oxygen produced (mL O2) was recorded.
The mean represents the average photosynthetic rates, the standard deviation (SD) indicates
the variability and so, how spread apart the data was. The standard error (SE) and the 95%
confidence interval (CI) represents the accuracy of how well the sample experimented with
represents its whole population.
Statistical Analysis of Aquatic Plant Photosynthetic Rates
Photosynthetic Rate (mL O2
produced/g/hour)
Trial 1
Trial 2
Trial 3
Trial 4
Sample
Size (n)
SD
SE
95%
CI
Experimental
Tubes
White Light
0.005
0.004
0.0058
0.0038
4
0.0009
0.0004
0.0008
Control
Tubes
White Light
0
0.0007
N/A
N/A
2
0.0005
0.00035
0.0007
Experimental
Tubes Red
Light
0.0017
0.0032
0.0009
0.0028
4
0.001
0.0005
0.001
Control
Tubes Red
Light
0.0038
0.0007
N/A
N/A
2
0.002
0.001
0.002
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