Some sources report that the weights of? full-term newbornbabies in a certain town have a mean of
99
pounds and a standard deviation of
0.60.6
pounds and are normally distributed.a. What is the probabilitythat one newborn baby will have a weight within
0.60.6
pounds of the
meanlong dash—that
?is, between
8.48.4
and
9.69.6
?pounds, or within one standard deviation of the? mean?b. Whatis the probability that the average of
ninenine
?babies' weights will be within
0.60.6
pounds of the? mean; will be between
8.48.4
and
9.69.6
?pounds?
c. Explain the difference between? (a) and? (b).
a. The probability is
nothing.
?(Round to four decimal places as? needed.)
