Some sources report the weights of full term newborn babies in a certain town have a mean of 9 pounds and a standard deviation of 0.6 pounds and are normally distributed. What is the probability that one newborn will have a weight within 0.6 pounds of the mean-that is ,between 8.4 and 9.6 pounds or within one standard deviation of the mean,

What is the probability that the average of 4 babies weights will be within 0.6 pounds of the mean, will be between 8.4 and 9.6 pounds.

Explain the difference