Birth weights at a local hospital have a Normal distribution with a mean of 110 ounces and a standard deviation of 15 ounces.
What proportion of infants have birth weights greater than 125 ounces?

Question

Quizplus · Accepted Answer

We need to use the standardized normal distribution to find the proportion of infants with birth weights greater than 125 ounces.

z = (125 - 110) / 15 = 1

Using a standard normal distribution table or calculator, we find that the probability of Z being greater than 1 is 0.159. Therefore, approximately 15.9% of infants have birth weights greater than 125 ounces.

Birth Weights at a Local Hospital Have a Normal Distribution