A particular IQ test is standardized to a Normal model, with a mean of 100 and a standard deviation of 18. a) Choose the model for these IQ scores that correctly shows what the 68-95-99.7 rule predicts about the scores. A. O B. C. 68% ,99 7%. 68% 95% 99.7% 82 100 118 136 154 95% 94% 997% H- 20 A+ 20 +30 H- 20 u+ 20 H- 20 +20 + 30 68% 64 82 100 118 136 154 H-30 H-30 NI+ 30 46 64 46 64 82 100 118 136 154 172 b) In what interval would you expect the central 68% of the IQ scores to be found? Using the 68-95-99.7 rule, the central 68% of the IQ scores are between 82 and 118. (Type integers or decimals. Do not round.) c) About what percent of people should have IQ scores above 136? Using the 68-95-99.7 rule, about 4.7 % of people should have IQ scores above 136. (Type an integer or a decimal. Do not round.)
A particular IQ test is standardized to a Normal model, with a mean of 100 and a standard deviation of 18. a) Choose the model for these IQ scores that correctly shows what the 68-95-99.7 rule predicts about the scores. A. O B. C. 68% ,99 7%. 68% 95% 99.7% 82 100 118 136 154 95% 94% 997% H- 20 A+ 20 +30 H- 20 u+ 20 H- 20 +20 + 30 68% 64 82 100 118 136 154 H-30 H-30 NI+ 30 46 64 46 64 82 100 118 136 154 172 b) In what interval would you expect the central 68% of the IQ scores to be found? Using the 68-95-99.7 rule, the central 68% of the IQ scores are between 82 and 118. (Type integers or decimals. Do not round.) c) About what percent of people should have IQ scores above 136? Using the 68-95-99.7 rule, about 4.7 % of people should have IQ scores above 136. (Type an integer or a decimal. Do not round.)
A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Transcribed Image Text:A particular IQ test is standardized to a Normal model, with a mean of 100 and a standard deviation of 18.
a) Choose the model for these IQ scores that correctly shows what the 68-95-99.7 rule predicts about the scores.
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C.
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u + o
68%
.99.7%.
68%
H- 204
95%
95%
95%
u + 20
H- 204
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H- 204
+ 20
H- 30
99.7%
H + 30
H- 30
68%
H+ 30
H- 30
99.7%
H+ 30
46
64
82
100 118 136
154
46
64
82
100 118
136
154
64
82
100
118 136
154
172
b) In what interval would you expect the central 68% of the IQ scores to be found?
Using the 68-95-99.7 rule, the central 68% of the IQ scores are between 82 and 118 .
(Type integers or decimals. Do not round.)
c) About what percent of people should have IQ scores above 136?
Using the 68-95-99.7 rule, about 4.7 % of people should have IQ scores above 136.
(Type an integer or a decimal. Do not round.)
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