Assume a standardized IQ test exists that possesses a normal distribution and has a mean score of 100 with a standard deviation of 10. Answer the following questions: 1. What is the z score for an IQ score of 95 (use the provided z-score table on pg.4)? You will now need to use Table A2 in your text to answer the following questions: What is the probability of selecting someone from the general population at random who would: 2. Score between 95 and 100?
Assume a standardized IQ test exists that possesses a normal distribution and has a mean score of 100 with a standard deviation of 10. Answer the following questions: 1. What is the z score for an IQ score of 95 (use the provided z-score table on pg.4)? You will now need to use Table A2 in your text to answer the following questions: What is the probability of selecting someone from the general population at random who would: 2. Score between 95 and 100?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Transcribed Image Text:Assume a standardized IQ test exists that possesses a normal distribution and has a mean score
of 100 with a standard deviation of 10. Answer the following questions:
1. What is the z score for an IQ score of 95 (use the provided z-score table on pg.4)?
You will now need to use Table A2 in your text to answer the following questions: What is the
probability of selecting someone from the general population at random who would:
2. Score between 95 and 100?
Transcribed Image Text:The following is a list of z-scores for two different IQ tests. The table on the LEFT is for an IQ
test with a mean score of 100 and a Standard Deviation (SD) of 10. The table on the RIGHT
is for an IQ test with a mean score of 100 and a SD of 5.
IQ Score
z-Score
75 -2.5
76 -2.4
77 -2.3
78 -2.2
79 -2.1
80 -2.0
81 -1.9
82 -1.8
83 -1.7
84 -1.6
85
-1.5
86 -1.4
87
-1.3
88 -1.2
89
-1.1
90 -1.0
91 -0.9
92 -0.8
93 -0.7
94 -0.6
95 -0.5
96 -0.4
97
-0.3
98 -0.2
99 -0.1
100 0
101 0.1
102 0.2
103 0.3
104 0.4
105 0.5
106 0.6
107 0.7
108 0.8
109 0.9
110 1.0
111 1.1
112
113 1.3
114 1.4
115 1.5
IQ Score
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
113
114
115
z-Score
-5.0
-4.8
-4.6
-4.4
-4.2
-4.0
-3.8
-3.6
-3.4
-3.2
-3.0
-2.8
-2.6
-2.4
-2.2
-2.0
-1.8
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
№
2.8
3.0
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