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Assume that blood pressure readings are normally distributed with a mean of 115 and a standard...

Assume that blood pressure readings are normally distributed with a mean of 115 and a standard deviation of 4.8. if 33 people are randomly selected, find the probability that their mean blood pressure will be less than 117.

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Expert Solution

Solution :

Given that ,

mean = = 115

standard deviation = = 4.8

= / n = 4.8 / 33 = 0.8356

P( < 115) = P(( - ) / < (115 -117) / 0.8356)

= P(z < -2.39)

= 0.0084

Probability = 0.0084

orchestra answered 3 years ago
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