Question
In: Statistics and Probability
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 of the
twin born first
,
given that the
twin born second
has an IQ of
103
?
Use a significance level of 0.05.
The best predicted IQ of the twin born first is ______.
Solutions
orchestra answered 1 year agoRelated Solutions
Suppose IQ scores were obtained from randomly selected twinstwins. For 2020 such pairs of people, the...
Suppose IQ scores were obtained from randomly selected
twinstwins.
For
2020
such pairs of people, the linear correlation coefficient is
0.8670.867
and the equation of the regression line is
ModifyingAbove y with caret equals 5.44 plus 0.93
xy=5.44+0.93x,
where x represents the IQ score of the
twin born secondtwin born second.
Also, the
2020
x values have a mean of
96.2696.26
and the
2020
y values have a mean of
94.9594.95.
What is the best predicted IQ of the
twin...
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...
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...
In a statistic class, 11 scores were randomly selected with the following results were obtained: 68,...
In a statistic class, 11 scores were randomly selected with the
following results were obtained: 68, 74, 66, 37, 52, 71, 90, 65,
76, 73, 22. What are the outer fences?
A)-6.0, 140.0
B)-10.0, 92.0
C)2.0, 128.0
D)2.0, 162.0
E)37.0, 107.0
Listed below are the IQ scores of identical twins that were adopted and raised apart. One...
Listed below are the IQ scores of identical twins that were
adopted and raised apart. One Twin Other Twin 90 95 99 101 105 106
109 103 111 113 98 100 89 92 115 116 100 102 107 104 110 112 102
101 98 99 92 94 100 101 111 112 117 120 102 99 95 93 105 107
Predict the IQ of the 2nd twin if the IQ of the 1st twin was
118.
Round your answer to 3...
(15pts) A researcher wants to compare IQ scores for boys and girls. He obtained IQ scores...
(15pts) A researcher wants to compare IQ scores for boys and
girls. He obtained IQ scores for 47 randomly sampled seventh-grade
boys in a Midwest school district and 31 seventh- grade girls in
the same district.
(a) Based on the design, which test should the researcher use to
analyze the data? One-sample t test, matched-pair t test or
two-sample t test?(2pts)
(b) Based on the JMP output below, report the 95% CI for the
mean IQ score difference between boys...
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...
Ten randomly selected people took an IQ test A, and the next day they took a...
Ten randomly selected people took an IQ test A, and the next day
they took a very similar IQ test B. Their scores are shown in the
table below.
Person
A
B
C
D
E
F
G
H
I
J
Test A
113
122
89
96
80
94
110
85
105
102
Test B
120
123
87
99
80
95
110
88
105
102
1. Consider (Test A - Test B). Use a 0.01 significance level to
test the claim...
) Scores on an IQ test are normally distributed. A sample of 20 IQ scores had...
) Scores on an IQ test are normally distributed. A sample of 20
IQ scores had standard deviation s = 8. The developer of the test
claims that the population standard deviation is ı = 12. Do these
data provide sufficient evidence to contradict this claim? Use the
Į = 0.05 level of significance.
3)
A) Reject H0. The population standard deviation appears to differ
from 12. B) Do not reject H0. There is insufficient evidence to
conclude that the...
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