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What component in the derivation of the sample variance and

1. Why is the standard deviation called the standard deviation?

2. What component in the derivation of the sample variance and standard deviation helps to correct for bias in sample variability?

3. Why is the bell-shaped curve called the normal distribution?

4. What is the purpose of squaring the summed deviations as one of the steps in deriving a standard deviation?

5. Show and explain how a negatively skewed distribution would appear on a graph.

6. Why is the overall mean that is created from combining the data from two samples called a weighted mean?

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