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The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15 days. If 36 women are randomly selected, find the probability that they have a mean pregnancy between 267 days and 269 days?

/in /by

The lengths of pregnancies are normally distributed with a mean of 267 days and a standard

deviation of 15 days. If 36 women are randomly selected, find the probability that they have

a mean pregnancy between 267 days and 269 days?

 

 

 

Assume that blood pressure readings are normally distributed with a mean of 116 and a standard deviation of 4.8. If 36 people are randomly selected, find the probability that their mean blood pressure will be less than 118?

/in /by

Assume that blood pressure readings are normally distributed with a mean of 116 and a

standard deviation of 4.8. If 36 people are randomly selected, find the probability that their

mean blood pressure will be less than 118?