Lab 7 Solar Energy
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University of Miami *
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Course
236
Subject
Electrical Engineering
Date
Dec 6, 2023
Type
Pages
4
Uploaded by nikkiramones
Nicole Ramones
Homework Questions Lab 07: Leaf Solar Energy Orientation and Output
Reminder:
Answer the questions according to the way instructed in the lab
handbook. See
Appendix D. Scientific Writing
and
Appendix E. Study Question
Checklist
for suggestions for how to do this appropriately.
If you do not report
your statistics correctly, you will not get full credit for answering the question.
See below for an example of how to report statistics:
1. Does the natural orientation of plant leaves collect a different amount of
solar energy than randomly oriented leaves?
-
From the experiment, Natural orientation did not collect a greater amount of
solar energy than random orientation. This can be proven by the p-value
which was greater than 0.05. This means that we fail to reject the null
hypothesis hence the result is not significant at p < 0.05. The mean of the
natural oriented leaves had a mean voltage of 8.35 and a Standard deviation
of 1.45, while the mean of the random paired oriented leaves had a mean
voltage of 8.36 and a Standard deviation of 1.53. So we can conclude that
there are no significant differences between naturally oriented solar energy
of naturally oriented versus randomly oriented leaves.
Conduct two separate paired t-tests and make box plots of the data. Adapt your
script from Lab 02 t-test script under the paired t test section. Make sure you
report the statistical values and include a biological explanation (reminder of
format above). Be sure to label axes and include figure caption below the figure.
Remember to read the information in the script on how to interpret a box plot and
include in your figure captions.
a. Use the data from your group to conduct one test and make a box plot.
Does the pattern observed by just your group match that of the whole
class data why or why not? Discuss briefly how sample size may
affect observational patterns in data? (10 pts)
FIG. 1. Shows the comparison of mean average voltages of leaves in their natural
orientation (blue) to randomly oriented leaves (orange) observed on a single tree at
the University of Miami (n=45 leaves measured). The line through each box
represents the median of each group. The "X" in each box and whisker represents
-
I conducted a two sample t test to compare the data from my group
(two sample paired t-test: df = 44, p-value = .8703, n= 45, Average =
8.390, Median = 7.96, Q1 = 7.69, Q3 = 8.885, IQR = 1.165). Since
p-value > α, H0 cannot be rejected. In other words the average of
Group 1's population, which is the voltage for natural oriented leaves,
is assumed to be equal to the average of Group 2's population voltage
of random oriented leaves. So the difference between the sample
average of Group 1 and Group 2 is not big enough to be statistically
significant. This similarity can be explained by the fact that the group
was only able to sample the leaves in reach. This limits our sample
size population. Sample size is important because the results from an
observation or experiment can be generalized to a population. Each
tree had about 100 to 200 leaves, and only 45 were sampled. If we
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When soldering, apply heat
solder will
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