Question
In: Statistics and Probability
Six sets of identical twins were randomly selected from a population of identical twins. Note that...
Six sets of identical twins were randomly selected from a population of identical twins. Note that identical twins are genetically the “same” person. One child was taken at random from each pair to form an experimental group and this group participated in a program designed to promote creative thinking. The other child was placed in a control group where no training was provided. At the end of the program, each group was given a creative problem-solving test with the results in the following table:
Twin pair A B C D E F
Experimental group 53 35 12 25 33 47
Control Group 39 21 5 18 21 42
Higher scores indicate better performance in creative problem-solving.
Compute d and d s .
At the 0.5% significance level, test the claim that the program given to the experimental group did promote creative problem-solving.
Solutions
orchestra answered 2 years agoRelated Solutions
Six sets of identical twins were randomly selected from a population of identical twins. One child...
Six sets of identical twins were randomly selected from a
population of identical twins. One child was taken at random from
each pair to form an experimental group. These children
participated in a program designed to promote creative thinking.
The other child from each pair was part of the control group that
did not participate in the program to promote creative thinking. At
the end of the program, a creative problem-solving test was given,
with the results shown in the...
Six sets of identical twins were randomly selected from a population of identical twins. One child...
Six sets of identical twins were randomly selected from a
population of identical twins. One child was taken at random from
each pair to form an experimental group. These children
participated in a program designed to promote creative thinking.
The other child from each pair was part of the control group that
did not participate in the program to promote creative thinking. At
the end of the program, a creative problem-solving test was given,
with the results shown in the...
Twelve sets of identical twins were enrolled in a study to measure the effect of home...
Twelve sets of identical twins were enrolled in a study to
measure the effect of home environment on certain social attitudes.
One twin in each set was randomly assigned to a foster environment
or a home environment. The twin assigned to the foster environment
went to live with a low income family on state welfare for a period
of 1 year. At the end of the year, an attitude survey was
administered.
Their results follow.
ID
1
2
3
4...
Twelve sets of identical twins were enrolled in a study to measure the effect of home...
Twelve sets of identical twins were enrolled in a study to
measure the effect of home environment on certain social attitudes.
One twin in each set was randomly assigned to a foster environment
or a home environment. The twin assigned to the foster environment
went to live with a low income family on state welfare for a period
of 1 year. At the end of the year, an attitudinal survey was
administered.
Their results follow.
Twelve sets of identical twins...
Suppose IQ scores were obtained from randomly selected twins . For 20 such pairs of people,...
Suppose IQ scores were obtained from randomly selected
twins
.
For
20
such pairs of people, the linear correlation coefficient is
0.937
and the equation of the regression line is
ModifyingAbove y with caret equals negative 16.5 plus 1.16 x
,
where x represents the IQ score of the
twin born second
.
Also, the
20
x values have a mean of
101.81
and the
20
y values have a mean of
101.8
.
What is the best predicted IQ...
Nine students were randomly selected from a population of 1000 students and they were given a...
Nine students were randomly selected from a population of 1000
students and they were given a math test. Test results are:
95 90 89 85 76
73 92 90 72 What
is the 84% confidence interval for the population mean score on the
math tests?
a) Do you need any assumptions? If yes, make the assumption.
b) Name the interval
c) 84% CI is
Fifteen people were randomly selected from the population and randomly assigned to 1 of 3 experimental...
Fifteen people were randomly selected from the population and
randomly assigned to 1 of 3 experimental groups. Group 3 was
included as the control group and did not receive any treatment.
Use the following data set to answer the questions.
Group 1
Group 2
Group 3
21
25
32
53
54
41
44
26
86
72
32
75
Is there a significant difference (α=0.05) between at
least two groups?
A.
Yes
B.
No
C.
Not possible to determine
D.
Alpha...
women between the ages of 70 and 80 were randomly selected from the general population of...
women between the ages of 70 and 80 were randomly selected from
the general population of women in this age group to take part in a
special program to decrease reaction time (speed). After the
course, the women had an average reaction time of 1.7 seconds.
Assume that the mean reaction time for the general population of
women in this age group is 1.9, with a standard deviation of 0.6
seconds. (Assume that the population is approximately normal.)
Use this...
There are two types of twins, monozygotic (identical) twins where the offspring are generated from the...
There are two types of
twins, monozygotic (identical) twins where the offspring are
generated from the unexpected splitting of the same fertilised egg,
while dizygotic (fraternal) twins arise from independent
fertilisations of two different eggs. Discuss the power
of STR profiling in discriminating between monozygotic and
dizygotic twins
Find confidence interval for population mean. The principal randomly selected six students to take an aptitude...
Find confidence interval for population
mean.
The principal randomly selected six students to take an aptitude
test. Their scores were:
71.5 80.4 77.1 86.5
82.1 72.3
Determine a 90% confidence interval for the mean score for all
students. Round to 2 decimal places.
73.52 < μ < 83.11
73.42 < μ < 83.21
83.21 < μ < 73.42
83.11 < μ < 73.52
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