Question

Given the following data, determine the correlation between IQ scores and psychology exam scores, OR between IQ scores and statistics exam scores, OR between psychology exam scores and statistics exam scores. Use the space below to show your work and enter your answer. *You do not have to determine the correlation for all three bivariate comparisons. CHOOSE 1.

Student IQ Score Psy Score Stats Score

1 140 48 37

2 98 35 42

3 105 36 38

4 120 43 40

5 119 30 40

6 114 45 43

7 102 37 33

8 112 44 47

9 111 48 46

10 116 46 44

Answer #1

Problem: The IQ test scores of 45 seventh-grade girls
in a Midwest school district are below.
111
107 100
107 115
111
97
112
104
106 113
109 113
128 128
118
113 124
127 136
106 123
124
126
116 127
119
97
102 110
120
103 115
93
123
79
119 110
110
107 105
105 110
77 90
Here are the IQ test scores of 30 seventh-grade boys in the same
school district. Is there good evidence...

The IQ scores of 50 students are given below.
117
85
108
86
104
110
90
116
101
113
116
111
108
112
97
115
86
110
119
87
95
99
116
98
110
115
99
114
100
88
92
106
96
103
108
85
94
96
113
98
108
88
95
96
115
106
93
92
115
101
(a) Construct a grouped frequency distribution for the data. Use
85-89 for the first class and use the same width for...

The amount of time it takes for a student to complete a
statistics exam is given by a random variable that is uniformly
distributed between 32 and 65 minutes. A student is selected at
random. Find the probability of the following events. In each case,
give exact answers or round to at least three decimal places.
The student’s time was between 38 and 44 minutes
equation editor
Equation Editor
The student’s time was less than 38 minutes
equation editor
Equation...

Below represent scores on an exam, each entry one score for one
student
40
99
59
98
63
63
64
65
67
35
67
67
68
70
71
71
71
46
72
72
60
73
74
74
74
75
97
75
62
76
76
76
76
76
77
57
77
98
77
63
78
78
78
79
79
80
80
80
80
80
81
81
92
81
93
82
82
83
83
83
83
83
83
83
84
84
84...

The following data represent the weight of a child riding a bike
and the rolling distance achieved after going down a hill without
pedaling.
Weight (lbs.)
Rolling Distance (m.)
59
26
83
43
97
49
56
20
103
65
87
44
88
48
91
42
52
39
63
33
71
39
100
49
89
55
103
53
99
42
74
33
75
30
89
30
102
40
103
33
99
33
102
35
86
37
85
37
Can it be...

Many standard statistical methods that you will study in Part II
of this book are intended for use with distributions that are
symmetric and have no outliers. These methods start with the mean
and standard deviation, x and s. For example,
standard methods would typically be used for the IQ and GPA data
here data215.dat.
(a) Find x and s for the IQ data. (Round your
answers to two decimal places.)
s=
Here are the numbers
obs gpa iq gender...

Part C: Regression and Correlation Analysis
Use the dependent variable (labeled Y) and the independent
variables (labeled X1, X2, and X3) in the data file. Use Excel to
perform the regression and correlation analysis to answer the
following.
Generate a scatterplot for the specified dependent variable (Y)
and the X1 independent variable, including the graph of the "best
fit" line. Interpret.
Determine the equation of the "best fit" line, which describes
the relationship between the dependent variable and the selected...

Using the accompanying Student Grades data, construct a scatter
chart for midterm versus final exam grades and add a linear
trendline. What is the model? If a student scores 7878 on the
midterm, what would you predict her grade on the final exam to
be?
Student
Midterm
Final Exam
1
75
64
2
85
91
3
80
68
4
88
83
5
76
60
6
67
80
7
78
74
8
95
94
9
67
61
10
93
87
11...

Given here are data for a dependent variable and four potential
predictors.
y
x1
x2
x3
x4
x5
96
8
60
2.4
48
51
73
6
64
2.1
42
43
108
2
76
1.8
34
20
124
5
74
2.2
11
14
82
6
50
1.5
61
29
89
9
57
1.6
53
22
76
1
72
2
72
38
109
3
74
2.8
36
40
123
2
99
2.6
17
50
125
6
81
2.5
48
55
101
2...

Your IT department provided you data on patients that received
ER services, their GHHS, and their recovery time. Prepare a report
to share with the owners of the facility that will help you make
informed decisions about how long you can expect a patients’
recovery time would be based on their GHHS. Based on your findings
provide recommendations on your plan moving forward to improve the
functioning of your facilities in generating revenue. Prepare a
report that addresses each of...

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