12 +
Cambria M
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3. Many people believe that the distribution of IQ scores follow a normal "bell curve." In reality is
this really how scores are distributed? The IQ scores of 60 fifth-grade students chosen at random
from one school are shown below.
134
110
118
109
96
139
134
124
122
122
81
133
97
125
113
115
105
145
109
106
101
125
113
116
89
110
100
117
110
130
123
102
102
103
118
136
109
129
101
131
117
112
124
127
114
82
142
117
90
114
112
124
139
101
137
127
108
102
114
a. Construct a histogram that effectively displays the distribution of IQ scores.
b. Describe what you see. Is the distribution normal?
c. Is this sample a good representation of fifth-graders IQ's? Explain.
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