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Weights of babies at the local community hospital have a distribution that is approximately normal with a mean weight of 7.43 pounds and a standard...

5. Weights of babies at the local community hospital have a distribution that is approximately normal with a mean weight of 7.43 pounds and a standard deviation of 1.25 pounds. A premature baby can be classified as being less than 5.51 pounds. Answer the following questions:

a. Find the probability of a randomly selected baby weighing less than 5.51 pounds.  mean: 7.43 stdev: 1.25 x: 5.51 Probability 0.06226919

b. If 25 babies are randomly selected, what is the probability that their weight will be less than 5.51 pounds?  (I'm having difficulty understanding part b).

Top Answer

a)  P ( x < 5 . 5 1 ) = 0 . 0 6 1 8... View the full answer

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ztable002.jpg

From z—Tahle with z = —?. EB Cummulative Estandar Normal Distribution {_|.|.= I}; a= 1}. z 0.00 0.01 0.02 0.03 0.04 0.05 0.05 0.07 am 0.09
—?.8 0.0000 0.00% [mm mono 0.0m mnnn manna mono...

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