QUESTION 1 : Imagine that your team has been assigned by a construction company to measure the dimensions of an empty lot in a subdivision. Briefly give examples of the 6 types/sources of errors described above and explain what you would do to minimize them.
QUESTION 2 : A certain gas is known to have a pressure of 9 psi. We are asked to take measurements using two different sensors. These are the results that we obtained after measuring the pressure of the gas 7 different times.
Sensor 1: 9.8 10.010.3 9.7 9.9 10.1 9.8
Sensor 2: 9.3 9.5 8.6 9.0 8.9 9.2 8.5
Do you believe one of the sensors is more accurate than the other? What about precise? Explain your reasoning.
QUESTION 3 : Calculate the mean and standard deviation from the values using Sensor 2. Show all your work step by step. Sensor 2values: 9.3 9.5 8.6 9.0 8.9 9.2 8.5
QUESTION 4 : If we were able to perform totally accurate and precise measurements, what would be the standard deviation in these conditions?
QUESTION 5 : By inspecting the mean and standard deviation values from Sensor 1 and Sensor 2, what can you say about the accuracy of each sensor. What about its precision?
QUESTION 6 : Calculate the Mean (Y) and Standard Deviation for each time completing the table below.
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Distance (y) at different time intervals in free-fall experiment
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Trial 1
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Trial 2
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Trial 3
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Trial 4
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Trial 5
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Mean
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Std. Dev.
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Time (s)
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Y1 (m)
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Y2 (m)
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Y3 (m)
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Y4 (m)
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Y5 (m)
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(Y (m))
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σ
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0.00
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0
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0
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0
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0
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0
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0.50
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1.0
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1.4
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1.1
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1.4
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1.5
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0.75
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2.6
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3.2
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2.8
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2.5
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3.1
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1.00
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4.8
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4.4
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5.1
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4.7
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4.8
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1.25
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8.2
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7.9
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7.5
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8.1
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7.4
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QUESTION 7 : Using the spreadsheet or plotting program of your choice, plot (Y) vs. t (that is, plot (Y) in the vertical axis and t in the horizontal axis.
LABORATORY REPORT
Create a laboratory report using Word or another word processing software that contains at least these elements:
Introduction: what is the purpose of this laboratory experiment?
Description of how you performed the different parts of this exercise. At the very least, this part should contain the answers to questions 1-7 above. You should also include procedures, etc. Adding pictures to your lab report showing your work as needed always increases the value of the report.
Conclusion: What area(s) you had difficulties with in the lab; what you learned in this experiment; how it applies to your coursework and any other comments.