Question

In: Statistics and Probability

Females have a mean pulse rate of 74 beats per minute (bpm) and a standard deviation...

Females have a mean pulse rate of 74 beats per minute (bpm) and a standard deviation of 12.5

bpm. If fifty females are randomly selected, what is the probability that their mean pulse rate

is greater than 79 bpm?

Expert Solution

Solution :

Given that,

mean = = 74

standard deviation = = 12.5

n=50

= =74

= / n = 12.5/ 50 = 1.77

P( > 79) = 1 - P( <79 )

= 1 - P[( - ) / < (79-74) /1.77 ]

= 1 - P(z < 0.60)

Using z table

= 1 - 0.7257

probability= 0.2743

orchestra answered 2 years ago

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