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Suppose people's systolic blood pressure were normally distributed with mean 130 mmHg and standard deviation 5...

Suppose people's systolic blood pressure were normally distributed with mean 130 mmHg and standard deviation 5 mmHg. Using the approximate EMPIRICAL RULE about what percentage of heights would be BETWEEN 120 and 140 mmHg?

Suppose people's systolic blood pressure were normally distributed with mean 130 mmHg and standard deviation 5 mmHg. Using the approximate EMPIRICAL RULE about what percentage of heights would be BELOW 140 mmHg ?

Suppose baseball batting averages were normally distributed with mean 250 and standard deviation 15. Using the approximate EMPIRICAL RULE about what percentage of players would have averages ABOVE 265 ?

Math   Statistics-And-Probability   
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