A nurse found that the lengths of babies in a hospital have a normal distribution with mean u and standard deviation o. He found that the length of 9.92% of the babies were less than 59.2 cm and the length of 9.92% of the babies were more than 73.6 cm. Find the values u and o. 250 babies are chosen at random. Find the expected number of babies which have a length of between 70 cm and 72.5 cm by using the answer (3 significant figures) in part (i).

MATLAB: An Introduction with Applications
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A nurse found that the lengths of babies in a hospital have a normal
distribution with mean u and standard deviation o. He found that the length
of 9.92% of the babies were less than 59.2 cm and the length of 9.92% of the
babies were more than 73.6 cm.
Find the values u and o.
250 babies are chosen at random. Find the expected number of babies which
have a length of between 70 cm and 72.5 cm by using the answer
(3 significant figures) in part (i).
Transcribed Image Text:A nurse found that the lengths of babies in a hospital have a normal distribution with mean u and standard deviation o. He found that the length of 9.92% of the babies were less than 59.2 cm and the length of 9.92% of the babies were more than 73.6 cm. Find the values u and o. 250 babies are chosen at random. Find the expected number of babies which have a length of between 70 cm and 72.5 cm by using the answer (3 significant figures) in part (i).
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