Question
In: Mechanical Engineering
The birth weight of two groups of babies were compared in a study. in one group...
The
birth weight of two groups of babies were compared in a study. in
one group the members took a zinc supplement during pregnancy. in
another group the mothers took a placebo. A sample of 263 babies in
the zinc group had a mean birth weight of 3282 grams. hey sample of
291 babies and placebo group had a mean birth weight of 3264 g
assume that the population standard deviation for the same group as
854 g by the population standard deviation for the placebo group of
699 grams. determine the 90% confidence interval for the true
difference between the mean birthweights for the zinc babies versus
the placebo babies.
please note how you find the z value in the formula.
find the point estimate please!
Solutions
samet mamat answered 4 months agoRelated Solutions
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 135 babies in the zinc group had a mean birth weight of 3075
grams. A sample of 141 babies in the placebo group had a mean birth
weight of 3002 grams. Assume that the population standard deviation
for the zinc group is 803 grams, while...
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 138 babies in the zinc group had a mean birth weight of 3016
grams. A sample of 111 babies in the placebo group had a mean birth
weight of 3343 grams. Assume that the population standard deviation
for the zinc group is 790 grams, while...
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 33 babies in the zinc group had a mean birth weight of 3249
grams. A sample of 31 babies in the placebo group had a mean birth
weight of 3143 grams. Assume that the population standard deviation
for the zinc group is 870 grams, while...
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 129 babies in the zinc group had a mean birth weight of 3469
grams. A sample of 142 babies in the placebo group had a mean birth
weight of 3318 grams. Assume that the population standard deviation
for the zinc group is 843 grams, while...
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 227 babies in the zinc group had a mean birth weight of 3255
grams. A sample of 276 babies in the placebo group had a mean birth
weight of 30023002 grams. Assume that the population standard
deviation for the zinc group is 708 grams, while...
The birth weights for two groups of babies were compared in a study. In one group...
The birth weights for two groups of babies were compared in a
study. In one group the mothers took a zinc supplement during
pregnancy. In another group, the mothers took a placebo. A sample
of 98 babies in the zinc group had a mean birth weight of 3423
grams. A sample of 80 babies in the placebo group had a mean birth
weight of 3004 grams. Assume that the population standard deviation
for the zinc group is 686 grams, while...
Nonparametric: A small study is conducted to compare birth weight in babies born to mothers who...
Nonparametric: A small study is conducted to compare birth
weight in babies born to mothers who do not smoke to those that
smoke more than ½ pack/day. Is there a significant difference
between birth weights due to maternal smoking status? Use the
Mann-Whitney U test with a 5% level of
significance. What is R1
(non-smokers)?
Birth weights of infants in two groups of mothers. (Observed
data)
Nonsmokers
Heavy Smokers (≥1/2 pack/day)
8.6
7.0
8.5
5.2
6.3
6.1
9.3
6.7
8.0...
12 subjects in a study were randomly assigned into two equally sized groups. One group was...
12 subjects in a study were randomly assigned into two
equally sized groups. One group was shown a short video on how to
fold paper cranes. The other group was given an instruction booklet
on how to do so. They were then asked to make paper cranes for the
next hour. The number of paper cranes each subject made was
recorded and is listed in the table below. The researchers are
interested in whether there was a difference in the...
A sample of the birth weight for 25 newborn male babies was taken from babies whose...
A sample of the birth weight for 25 newborn male babies was
taken from babies whose mother took prenatal vitamin supplements.
The results of the study showed an average birth weight of 3.953 kg
and a standard deviation of 0.552 kg. The claim is that taking
vitamin supplements increase the baby’s birth weight. The mean
birth weight for all male babies is 3.58 kg
1. What can you conclude by comparing the 95% Confidence
Interval and the mean weigh of...
The birth weight of babies is approximately LOGNORMALLY distributed, with a mean of 3732 grams and...
The birth weight of babies is approximately LOGNORMALLY
distributed, with a mean of 3732 grams and a standard deviation of
472 grams.
(a) What is the probability that a baby’s weight exceeds
5000g?
(b) What is the probability that a baby’s weight is between 3000g
and 4000g?
(c) What are the 10th, 50th, and 95th percentile weights for a
baby?
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