The weights of baby boys at six months is normally distributed with a mean of 17.25...

The weights of baby boys at six months is normally distributed with a mean of 17.25 lbs. and a standard deviation of 2.0 lbs. By an age of twelve months, the mean increases to 22.50 lbs. and the standard deviation is 2.2 lbs.
1. Which age group has the wider distribution?
  1. When baby turn 1 year old has the wider dist.
2. What percentage of the twelve-month old boys weigh more than 26.9 lbs.?
3. What percentage of six-month old boys weigh between 15.25 lbs. and 19.25 lbs.?
4. A twelve-month old boy who weighs 24.7 lbs. is what percentile for weight?

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orchestra answered 1 year ago

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