That would be correct if it were 3 < x <= 12.I am not sure why the answer is B? I thought it was C by adding the frequencies for the 4-6, 7-9, and 10-12 bars and then divide by 100: (22 + 23 + 15) / 100 = 0.6
Ah, I see! Thank you very much!That would be correct if it were 3 < x <= 12.
They are evidently supposing that the 10-12 interval is equally divided among 10, 11, and 12 in order to make a reasonable estimate.