Caffeine content in a 5-ounce cup of brewed coffee range from 60 to 180mg, depending brew time, coffee bean type and grind (a) Use the midrange as a measure of center (b) Use the Empirical Rule to estimate the standard deviation. (c) Why is the assumption of a normal, bell-shaped distribution important in marking these estimate? (d) Why might caffeine content of coffee not be normal?
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