Lab 1 - Graphing Lab Report
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School
California State University, Long Beach *
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Course
9056
Subject
Aerospace Engineering
Date
Apr 3, 2024
Type
docx
Pages
3
Uploaded by ChancellorPrairieDog4314
LAB 1: GRAPHICAL REPRESENTATIONS OF DATA
Names
:
TABLE 1: GAS DATA
VAPOR TEMPERATURE
T
( ℃
)
VAPOR PRESSURE
P
( Pa
)
10.4
19
20.3
29
30.2
37
39.5
71
49.5
112
60.9
155
68.7
265
80.0
369
83.0
522
92.3
753
Table 2:
Trendline Coefficients
Lab 1: Graphical Representations of Data
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Cubic Coefficient
(Pa/°C
3
)
Quadratic
Coefficient
(Pa/°C
2
)
Linear Coefficient
(Pa/°C)
Constant
Coefficient
(Pa)
First Graph
Second Graph
Third Graph
Table 3:
Trendline Fit Errors
Error in the Linear
Coefficient
(Slope)
(Pa/°C)
Error in the
Constant
Coefficient
(Intercept)
(Pa)
First Graph
GRAPHS
Submit or attach the three properly-formatted graphs as detailed in the procedure.
QUESTIONS
Lab 1: Graphical Representations of Data
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Answer the following questions below using complete sentences:
1.
For the first graph, the R
-squared value can be treated as a statistical measure of how close the data are to the trendline curve. R
-squared has a minimum value of 0 and a maximum value of 1; the higher the R
-squared value, the better that the trendline fits the data. 𝑅
-squared is one statistical measure of how close the plotted data are to the linear trendline. R-squared has a minimum value of 0 and a maximum value of 1. When the value is less than or equal to 0.9 , the trendline’s connection to the data is qualified as being “weak”. When the value is greater than 0.9 , the trendline’s connection to the data is qualified as being “strong”. For your first graph, qualify the trendline’s connection to the data.
2.
𝑅𝑀𝑆𝐸
is another statistical measure of how close the plotted data are to the linear trendline. The PASCO
capstone graphing package utilizes the RMSE
value to characterize the trend line fits. The lower its RMSE numerical value, the better its associated trendline matches the plotted data. Considering your second and third plots, which trendline best matches the data?
3.
Below is a scanned image of a scatter plot based on data collected, by a student, from a different
experiment. Identify at least three mistakes that the student made in creating this graph.
i.
ii.
iii.
Lab 1: Graphical Representations of Data
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