The correct option is C. The statement is true because there are 50 possible IQ scores.
For the given question-
The frequency for the total students are given on the graph.
The highest frequency is for 30 people.
The difference in the IQ score are ; 130 - 70 = 50
Thus, the statement that graph is based on a sample of approximately 50 people the is true because there are 50 possible IQ scores.
To know more about the frequency of the graph, here
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