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2 cards from this section. Quick, good the night before a test.
What shape is the graph of a normal distribution?
Think about its symmetry and appearance.
What do we call the central value around which a normal distribution is symmetrically arranged?
It's also known as the average.
What characterizes a normal distribution?
Remember, it's named after a shape associated with bells.
True or False: The total area under the curve of a normal distribution is always equal to 1.
Think about how probabilities are defined.
Given a normally distributed set with a mean of 100 and a standard deviation of 15, calculate the z-score for a value of 130.
Z-scores can help you understand how far away from the mean a value is.
If a structural component follows a normal distribution with a mean load of 5000 N and a standard deviation of 200 N, what is the likelihood it will fail if it can only support loads of 5300 N or less?
Think about what it means for a value to be above the mean.
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