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2 cards from this section. Quick, good the night before a test.
What is the formula for standard deviation?
Think about how standard deviation relates to variance.
Why is standard deviation preferable over variance?
Consider the implications of units in interpretation.
What does a high standard deviation indicate?
Think about the distribution of values.
True or False: Standard deviation can be negative.
Consider what SD represents and the significance of distance.
You collect the heights of five basketball players: 180 cm, 190 cm, 185 cm, 175 cm, and 195 cm. Calculate the variance and standard deviation of their heights.
First, find the mean, then calculate squared differences and their average.
In a statistical experiment, the weights of bats are recorded as: 2.0 kg, 2.5 kg, 2.4 kg, and 3.0 kg. If the standard deviation is computed to be 0.3 kg, discuss how this affects the consistency of bat weights.
Reflect on what standard deviation tells us about the range of weights.
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