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Pre-Lab 1

Pre-Lab 1: Using Uncertainties

Uncertainties are a vital part of any scientist or engineer's toolkit. This set of on-line resources introduces how you interpret and use uncertainties.

How to work through this lesson?

Watch the short video clips in order. After each one, try out the questions to make sure that you've mastered the key concepts.

For students enrolled in PHYS1101, once you've finished the lesson you will need to go into Wattle and answer the pre-lab questions in this week's homework.


Probability Distribution Functions (5:32)


Questions about the Video

Question 1
Imagine that someone has given you a plot of the probability distribution function for the likely temperature in Canberra in July. How would you work out the odds that the temperature at a given moment in July would be below -3 degrees?

Click here to see the answer.


Question 2 An electric circuit produces a variable voltage, described by this probability distribution function:

Describe in words the voltages likely to come from this circuit.

Click here to see the answer.

Question 3 The intensity of light from a pulsar ranges from about 1.4W up to 10 W. Higher values are more frequently seen than lower ones. Sketch the probability distribution function of the light from this pulsar.

Click here to see the answer.


The Gaussian Curve (4:28)


The Standard Uncertainty (4:00)

Testing Hypotheses in the Presence of Uncertainty (5:36)

Fitting Models to Data in the Presence of Uncertainty (4:31)

Making Predictions in the Presence of Uncertainty (3:52)


Put your questions or comments here