1. Below are the results of 30 sixth-grade I.Q. scores. 92 95 97 100 102 106 93 95 98 100 97 108 103 108 94 99 100 103 108 94 97 100 100 103 94 97 100 101 104 109 The histogram for the raw data of 30 sixth-grade I.Q. scores is presented in the graph. 20 18 16 14 12 Number of Students

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. Below are the results of 30 sixth-grade I.Q. scores.
92
95
97
100
102
106
93
95
98
100
103
108
94
97
99
100
103
108
94
97
100
100
103
108
94
97
100
101
104
109
The histogram for the raw data of 30 sixth-grade I.Q. scores is presented in the graph.
20
18
16
14
12
10
87
94
101
108
115
122
IQ scores
Using statistical knowledge, state one valid observation about the distribution of data in context of the scenario. Be
sure to write one complete sentence, i.e., use college-level writing, in order to earn full credit.
Number of Students
Transcribed Image Text:1. Below are the results of 30 sixth-grade I.Q. scores. 92 95 97 100 102 106 93 95 98 100 103 108 94 97 99 100 103 108 94 97 100 100 103 108 94 97 100 101 104 109 The histogram for the raw data of 30 sixth-grade I.Q. scores is presented in the graph. 20 18 16 14 12 10 87 94 101 108 115 122 IQ scores Using statistical knowledge, state one valid observation about the distribution of data in context of the scenario. Be sure to write one complete sentence, i.e., use college-level writing, in order to earn full credit. Number of Students
2. The analytic scores on a standardized aptitude test are known to be normally distributed with mean u = 610 and
standard deviation o = 115. A normal curve with the parameters labeled is given below with a specific shaded region.
Suppose the area under the normal curve to the left of X = 725 is 0.8413. What does this represent in context of
analytic scores on a standardized aptitude test? Be sure to write one complete sentence, i.e., use college-level writing,
in order to earn full credit.
610
725
3. In an area of the Midwest, records were kept on the relationship between the rainfall (in inches) and the yield of wheat
(bushels per acre). The data from the table are represented by a scatter plot and least-squares regression line. What
is the relationship between yield of wheat and rainfall? What is the type of association? Be sure to write one complete
sentence, i.e., use college-level writing, in order to earn full credit.
Rain fall (in inches)
Yield (bushels per acre)
10.5
8.8
13.4
12.5
18.8
10.3
7.0
15.6
16.0
50.5
46.2
58.8
59.0
82.4
49.2
31.9
76.0
78.8
ý = 4.3791a + 4.2668
85
80
75
70
65
60
55
50
45
40 +
35
30
10
14
18
22
26
Rain Fall (in.)
Yield of Wheat
Transcribed Image Text:2. The analytic scores on a standardized aptitude test are known to be normally distributed with mean u = 610 and standard deviation o = 115. A normal curve with the parameters labeled is given below with a specific shaded region. Suppose the area under the normal curve to the left of X = 725 is 0.8413. What does this represent in context of analytic scores on a standardized aptitude test? Be sure to write one complete sentence, i.e., use college-level writing, in order to earn full credit. 610 725 3. In an area of the Midwest, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). The data from the table are represented by a scatter plot and least-squares regression line. What is the relationship between yield of wheat and rainfall? What is the type of association? Be sure to write one complete sentence, i.e., use college-level writing, in order to earn full credit. Rain fall (in inches) Yield (bushels per acre) 10.5 8.8 13.4 12.5 18.8 10.3 7.0 15.6 16.0 50.5 46.2 58.8 59.0 82.4 49.2 31.9 76.0 78.8 ý = 4.3791a + 4.2668 85 80 75 70 65 60 55 50 45 40 + 35 30 10 14 18 22 26 Rain Fall (in.) Yield of Wheat
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