Question
In: Statistics and Probability
A study of chromosome abnormalities and criminality examined data from 4,124 males born in Copenhagen. Each...
A study of chromosome abnormalities and criminality examined data from 4,124 males born in Copenhagen. Each man was classified as having a criminal record or not, using the registers maintained in the local police offices. Each was also classified as having the normal male XY chromosome pair or one of the abnormalities XYY or XXY. Of the 4,096 men with normal chromosomes 381 had criminal records, while 8 of the 28 men with abnormal chromosomes had criminal records. Some experts believe chromosome abnormalities are associated with increased criminality.
A. Do these data lend support to this belief? Perform a significance test to answer this question. (10 points)
B. Construct and interpret a 95% confidence interval for the difference in proportions. (4 points)
Solutions
orchestra answered 2 years agoRelated Solutions
A study is given in which scientists examined data on mean sea surface temperatures (in degrees...
A study is given in which scientists examined data on mean sea
surface temperatures (in degrees Celsius) and mean coral growth (in
millimeters per year) over a several-year period at different
locations. Here are the data:
Sea Surface Temperature 29.69 29.88 30.17 30.22 30.48 30.65
31.00
Growth 2.64 2.57 2.68 2.70 2.48 2.37 2.25
(a) Use your calculator to find the mean and standard deviation
of both sea surface temperature x and growth y and the correlation
r between x...
A study is given in which scientists examined data on mean sea surface temperatures (in degrees...
A study is given in which scientists examined data on mean sea
surface temperatures (in degrees Celsius) and mean coral growth (in
millimeters per year) over a several-year period at different
locations. Here are the data:
Sea Surface Temperature
29.69 29.86
30.16 30.21
30.48 30.65 30.90
Growth
2.62
2.57
2.68
2.60
2.49
2.39 2.25
(a) Use your calculator to find the mean and standard deviation
of both sea surface temperature x and growth y
and the correlation r between x...
A study examined parental influence on the decisions of teenagers from a certain large region to...
A study examined parental influence on the decisions of
teenagers from a certain large region to smoke. A randomly selected
group of students, from the region, who had never smoked were
questioned about their parents' attitudes toward smoking. These
students were questioned again two years later to see if they had
started smoking. The researchers found that, among the
263
students who indicated that their parents disapproved of kids
smoking,
53
had become established smokers. Among the
43
students who...
In a study of people first getting acquainted with each other, researchers examined the relationship between...
In a study of people first getting acquainted with each other,
researchers examined the relationship between the amount of
self-disclosure and how much that person likes their partner. Here
are the results:
Person
Partner's Self Disclosure
Liking for Partner
1
8
7
2
7
9
3
10
6
4
3
7
5
1
4
First, state the null and alternative hypothesis.
How much of the variance in liking for a partner explained by
the amount of self-disclosure?
Should a person...
A recent study examined hearing loss data for 1666 U.S. teenagers. In this sample, 307 were...
A recent study examined hearing loss data for 1666 U.S.
teenagers. In this sample, 307 were found to have some level of
hearing loss. News of this study spread quickly, with many news
articles blaming the prevalence of hearing loss on the higher use
of ear buds by teens. At MSNBC.com (8/17/2010), Carla Johnson
summarized the study with the headline: “1 in 5 U.S. teens has
hearing loss, study says.” To investigate whether this is an
appropriate or a misleading...
A recent study examined hearing loss data for 1,771 U.S. teenagers. In this sample, 333 were...
A recent study examined hearing loss data for 1,771 U.S.
teenagers. In this sample, 333 were found to have some level of
hearing loss. Your goal is to estimate the true long run proportion
of all U.S teenagers who have some level of hearing loss.
Suppose we are interested in whether
or 1 in 5 teens have hearing loss or not.
In symbols, state the correct hypotheses to test this
claim.
Based on your confidence interval above, would you reject...
A study examined parental influence on the decisions of teenagers from a certain large region to smoke.
A study examined parental influence on the decisions of teenagers from a certain large region to smoke. A randomly selected group of students, from the region, who had never smoked were questioned about their parents' attitudes toward smoking. These students were questioned again two years later to see if they had started smoking. The researchers found that, among the 256 students who indicated that their parents disapproved of kids smoking, 72 had become established smokers. Among the 30 students...
In a study of obesity the following results were obtained from samples of males and females...
In a study of obesity the following results were obtained from
samples of males and females between the ages of 20 and 75:
n Number OverweightMales 150 21
Females 200 48
Can we conclude from these data that in the sampled populations
there is a difference in the
proportions who are overweight? Let a = .05.
Genes A and B are located 10cM from each other on a chromosome. Gene C is...
Genes A and B are located 10cM from each other on a
chromosome. Gene C is located 25cM from gene A and 15cM from gene
B. Assuming that I = 0, what is the probability that the trihybrid
ABC/abc will produce an ABC gamete?
I get that ABC is a result of a double crossover. A similar
question was answered and said that
Probability of SCO - DCO = 0.25 - 0.015 = 0.235
PLEASE EXPLAIN HOW YOU GET .25...
6. The following data shows the number of new born babies on each day of the...
6. The following data shows the number of new born babies on
each day of the week.
Day
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
# of baby
123
116
92
92
104
96
77
Is the proportion of new born babies on the each day of week
same or different? Explain your answer.
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