Question
In: Statistics and Probability
Pediatricians have been able to determine that the distribution of birth weights for boys is approximately...
Pediatricians have been able to determine that the distribution of birth weights for boys is approximately normal with mean 3494 grams and standard deviation 603 grams. They have also determined that the distribution of birth weights for girls is approximately normal with mean 3266 grams and standard deviation 570 grams.
1. A particular baby boy called Ash weighed 3927 grams at birth. Find the proportion of boy babies who weighed less than Ash. Round your answer to 3 decimal places.
2. Ash has a friend Brock who weighed 3232 grams at birth. What proportion of boy babies weigh between Ash and Brock? Round your answer to 3 decimal places.
3. Ash and Brock have a female friend named Misty. Her birthweight corresponded to the 40th percentile for female birth weights. How much did she weigh at birth? Round your answer to 1 decimal place.
Solutions
orchestra answered 1 year agoRelated Solutions
Pediatricians have been able to determine that the distribution of birth weights for boys is approximately...
Pediatricians have been able to determine that the distribution of
birth weights for boys is approximately normal with mean 3494 grams
and standard deviation 603 grams. They have also determined that
the distribution of birth weights for girls is apporximately normal
with mean 3266 grams and standard deviation 570 grams.
1. There is a baby boy named Brock who weighed 3232 grams at
birth. There is a baby girl named Brittney who weighed 3137 grams.
Who has a relatively hugher...
The distribution of weights for 12 month old baby boys in the US is approximately normal...
The distribution of weights for 12 month old baby boys in the US
is approximately normal with mean 22.5 pounds and a standard
deviation of 2.2 pounds. a. if a 12 month old boy weights 20.3
pounds, what weight percentile is he in approximately. b. if a 12
month old boy is in the 84th percentile in weight, estimate his
weight. c. Estimate the weight of a 12 month old boy who is in the
25th percentile by weight. d....
R programming Babies born in the US have birth weights that are approximately normally distributed with...
R programming
Babies born in the US have birth weights that are approximately
normally distributed with mean 3.339 kg and standard deviation
0.573 kg.
Using R, determine:
a) What fraction of babies are more than 1.5 standard deviations
from the mean in either direction?
b) What fraction of babies are more than 1.5 kg from the mean in
either direction?
c) If you took a random sample of 100 babies, what is the
probability that their mean weight Y is...
Birth weights at a local hospital have a Normal distribution with a mean of 110 oz...
Birth weights at a local hospital have a Normal distribution
with a mean of 110 oz and a standard deviation of 15 oz. You take a
random sample of babies born at the hospital and find the mean
weight. What is the probability that the mean weight will be
between 111 and 114 in a sample of 50 babies born at this hospital?
Round to 3 decimal places.
Distributions: List the characteristics of a normal distribution. The weights of baby boys at six months...
Distributions:
List the characteristics of a normal distribution.
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.
Which age group has the wider distribution?
What percentage of the twelve-month old boys weigh more than
26.9 lbs.?
What percentage of six-month old boys weigh between 15.25 lbs....
Suppose body mass index (BMI) varies approximately to the normal distribution in a population of boys...
Suppose body mass index (BMI) varies approximately to the normal
distribution in a population of boys aged 2-20. A national survey
analyzed the BMI for American adolescents in this age range and
found the µ=20 and the σ=1.75.
A) What is the 25th percentile of this
distribution?
B) What is the z-score corresponding to finding a boy with at
least a BMI 18.25?
C) What is the probability of finding a boy with at least this
BMI, 18.25?
The weights of newborn baby boys born at a local hospital are believed to have a...
The weights of newborn baby boys born at a local hospital are
believed to have a normal distribution with a mean weight of 3311
grams and a standard deviation of 404 grams. If a newborn baby boy
born at the local hospital is randomly selected, find the
probability that the weight will be less than 3715 grams. Round
your answer to four decimal places.
The weights of newborn baby boys born at a local hospital are believed to have a...
The weights of newborn
baby boys born at a local hospital are believed to have a normal
distribution with a mean weight of 3915 grams and a variance of
429,025. If a newborn baby boy born at the local hospital is
randomly selected, find the probability that the weight will be
less than 4570 grams. Round your answer to four decimal places.
The distribution of weights of United States pennies is approximately normal with a mean of 2.5...
The distribution of weights of United States pennies is
approximately normal with a mean of 2.5 grams and a standard
deviation of 0.03 grams.
(a) What is the probability that a randomly chosen penny weighs
less than 2.4 grams?
(b) Describe the sampling distribution of the mean weight of 10
randomly chosen pennies.
(c) What is the probability that the mean weight of 10 pennies
is less than 2.4 grams?
(d) Could you estimate the probabilities from (a) and (c)...
The weights of boxes of a certain brand of pasta follow an approximately normal distribution with...
The weights of boxes of a certain brand of pasta follow an
approximately normal distribution with a mean of 16 ounces and a
standard deviation of 0.05 ounces.
What percentage of boxes have weights that are more than 1
standard deviation above the mean? (Use the Empirical Rule 68, 95,
99.7)
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