Question: 1. A sample has a bell-shaped distribution with a mean of 78 and standard deviation of 6. (a) Use the Empirical Rule to find the

1. A sample has a bell-shaped distribution with a mean of 78 and standard deviation of 6. (a) Use the Empirical Rule to find the 68% range. (b) Find the usual range of values (mean 2standard deviation). (c) What percentage of the sample falls below 90

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