Practice question

Question

Suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a standard deviation of 2.6. Find the probability that a given infant is between 17.4 and 22 .6 inches long.

Answer 1

The range you give, 17.4 - 22.6, is plus or minus one standard deviation.  In a normal distribution, the probability that an answer will fall within one standard deviation is 95%.  I think...