Assume that blood pressure readings are normally distributed with a mean of 124 and a standard...

Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 9.6. If 144 people are randomly selected, find the probability that their mean blood pressure will be less than 126. Round to four decimal places.

Expert Solution

Solution :

Given that ,

mean = = 124

standard deviation = = 9.6

= / n = 9.6 / 144 = 0.8

P( < 126) = P(( - ) / < (126 - 124) / 0.8)

P(z < 2.5)

= 0.9938

Probability = 0.9938

orchestra answered 2 years ago

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