Some sources report that the w

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Some sources report that the weights of​ full-term newborn babies in a certain town have a mean of 8 pounds and a standard deviation of 0.6 pounds and are normally distributed.  

a. What is the probability that one newborn baby will have a weight within 0.6 pounds of the mean long dash—that ​is, between 7.4 and 8.6 ​pounds, or within one standard deviation of the​ mean?

b. What is the probability that the average of four ​babies' weights will be within 0.6 pounds of the​ mean; will be between 7.4 and 8.6 ​pounds?

c. Explain the difference between​ (a) and​ (b). 

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