# Bell curve, Standard deviation, Statistical significance

1) In research we often rely on the 68-95-99.7 rule. Discuss how this can be applied to make statements about the number of data values below 1, 2, or 3 standard deviations from the mean. Give an example of application of this rule.

2) In a research study, what does statistically significant mean? How are decisions made on data based on significance? What do you do with data that is not significantly different?

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#### Solution Summary

This solution discusses bell curves, standard deviations, and statistical significance.

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