Question 385373: At an urban hospital, the weights of all newborns are recorded. Over the last 10 years, the daily rate has been in excess of 50 births per day. The mean and stdev of weights for all recorded newborns is shown below. What is the probability that:
Pounds
m 7.125
stdev 0.125
a. A baby born today will weigh 8 pounds or more?
z(8) = (9-7.125)/0.125 = 15
Question: Why is 9 used instead of the z score 8? When I use 8 I end up with the probabiliy of 1. Also, would 15 be the answer to the probability or am I missing a step?
Thank you,
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! At an urban hospital, the weights of all newborns are recorded. Over the last 10 years, the daily rate has been in excess of 50 births per day.
The mean and stdev of weights for all recorded newborns is shown below.
What is the probability that:
Pounds
m 7.125
stdev 0.125
a. A baby born today will weigh 8 pounds or more?
z(8) = (8-7.125)/0.125 = 7
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Now, what is the question?
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Cheers,
Stan H.
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