Asked by Kelsi
It is not surprising that babies with low birth weights are at risk for developmental difficulties, but extraoridinarily large babies also face a higher than noraml risk of medical problems. In the United States the average full term single birth baby has a weight of 3.4 kg with a standard deviation of 0.6 kg.
a) Babies below 2.5 kg in weight are considered to be high risk/low weight deliveries. Assuming birth weghts are normally distributed, what percentage of births would be in this category?
b) Babies above 4.6 in weight are considered to be high risk/high birth weight deliveries. What percentage of births would fall in this category?
c) Suppose a new study claims that only the middle 80% of the birth weights should be considered normal. What would be the new cut-off points for low and high weight risk deliveries?
****PLEASE provide steps & answers! Thanks :)
a) Babies below 2.5 kg in weight are considered to be high risk/low weight deliveries. Assuming birth weghts are normally distributed, what percentage of births would be in this category?
b) Babies above 4.6 in weight are considered to be high risk/high birth weight deliveries. What percentage of births would fall in this category?
c) Suppose a new study claims that only the middle 80% of the birth weights should be considered normal. What would be the new cut-off points for low and high weight risk deliveries?
****PLEASE provide steps & answers! Thanks :)
Answers
Answered by
PsyDAG
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for each Z score.
For C, use P(±.40) to find Z and insert into equation above.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for each Z score.
For C, use P(±.40) to find Z and insert into equation above.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.