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The mean systolic blood pressure for a population of patients (µ) from a local clinic is...

The mean systolic blood pressure for a population of patients (µ) from a local clinic is 130 with a standard deviation (?) of 18.

What systolic blood pressure marks the top 30% of highest reported levels in the population of patients? Rounded to the nearest tenth.

134.5
139.4
93.4
0.2
145.9
Math   Statistics-And-Probability   
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