In: Math
The weights for newborn babies is approximately normally distributed with a mean of 5lbs and a standard deviation of 1.5lbs. Consider a group of 1,000 newborn babies:
How many would you expect to weigh between 4-7lbs?
How many would you expect to weigh less than 6lbs?
How many would you expect to weigh more than 5lbs?
How many would you expect to weigh between 5-10lbs?
The newborn babies expect to weigh between 4-7lbs is
1000 * 0.6868 = 656.8
Answer: 656.8
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The newborn babies expect to weigh less than 6lbs is
1000 * 0.7486 = 748.6
Answer: 748.6
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The newborn babies expect to weigh more than 5lbs is
1000 * 0.5 = 500
Answer: 500
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The newborn babies expect to weigh between 5-10 lbs is
1000 * 0.4999 = 499.9
Answer: 499.9