The IQ level of 30 students is listed below: 111, 98, 120, 101, 122, 140, 95, 102, 110, 129, 133, 115, 137, 99, 106, 135, 127, 115, 104, 100, 109, 130, 144, 121, 136, 125, 120, 139, 109, 112. Draw a histogram of the above data with class interval 95-105, 105-115 and so on. Answer the questions that follow: a) Which group has the maximum number of workers? b) How many students have an IQ more than 125?
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10 students have an IQ more than 125
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