a. What is the independent variable? b. What is the dependent variable? c. Calculate the standard deviation for the plants in sunlight only.

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
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Chapter31: Soil And Plant Nutrition
Section: Chapter Questions
Problem 4RQ: For an element to be regarded as essential, all of the following criteria must be met, except: No...
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4. A scientist is testing whether or not sunlight has an effect on plant growth. They tested 6 plants. Two
were placed in full sunlight and 2 were placed in the dark. After 2 weeks, the height of the plant was
measured and recorded. This data is below. (20 pts)
Sunlight
No sunlight
Plant 1
20.32 cm
Plant 1
8.6 cm
Plant 2
24 cm
Plant 2
7.3 cm
Plant 3
22.16 cm
Plant 3
8.1 cm
Transcribed Image Text:4. A scientist is testing whether or not sunlight has an effect on plant growth. They tested 6 plants. Two were placed in full sunlight and 2 were placed in the dark. After 2 weeks, the height of the plant was measured and recorded. This data is below. (20 pts) Sunlight No sunlight Plant 1 20.32 cm Plant 1 8.6 cm Plant 2 24 cm Plant 2 7.3 cm Plant 3 22.16 cm Plant 3 8.1 cm
a. What is the independent variable?
b. What is the dependent variable?
c. Calculate the standard deviation for the plants in sunlight only.
d. Calculate the standard deviation for the plants in no sunlight only.
e. Calculate a 95% confidence interval (+/- 2SEM) for the plants in sunlight only.
f.
Calculate a 95% confidence interval (+/- 2SEM) for the plants in no sunlight only.
g. Graph the means for your data. Be sure to add error bars, appropriate labels, titles, and keys. If
you feel comfortable using google sheets, feel free to do so. Or graph by hand and insert the
image.
h. What can you conclude about the significance of our experiment (be sure to discuss error bars
in your response).
Transcribed Image Text:a. What is the independent variable? b. What is the dependent variable? c. Calculate the standard deviation for the plants in sunlight only. d. Calculate the standard deviation for the plants in no sunlight only. e. Calculate a 95% confidence interval (+/- 2SEM) for the plants in sunlight only. f. Calculate a 95% confidence interval (+/- 2SEM) for the plants in no sunlight only. g. Graph the means for your data. Be sure to add error bars, appropriate labels, titles, and keys. If you feel comfortable using google sheets, feel free to do so. Or graph by hand and insert the image. h. What can you conclude about the significance of our experiment (be sure to discuss error bars in your response).
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