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4 cards from this section. Quick, good the night before a test.
Calculate the mean of the following data: 6, 2, 9, 5, 3.
Add the numbers together and divide by how many data points there are.
True or False: The standard deviation can be negative.
Think about how we define standard deviation.
What does variance measure?
Think of how variance relates to the average value of data points.
True or False: Standard deviation is simply a squared measurement of variance.
Consider the definition of standard deviation regarding variance.
You collected the following set of data: 5, 7, 5, 8, 12. Calculate the variance and standard deviation, and discuss the implications of these measurements.
Go step-by-step, calculating the mean first, then varied deviations.
Consider two sets of data: Set A: {6, 7, 8}, Set B: {2, 11, 12}. Calculate the variances for both sets and summarize differences in variability.
Remember to find the mean for each set then calculate the squared differences.
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