Question: The hemoglobin A1c test a blood test given to diabetic

The hemoglobin A1c test, a blood test given to diabetic patients during their periodic checkups, indicates the level of control of blood sugar during the past 2 to 3 months. The following data values were obtained for 40 different diabetic patients at a university clinic:
a. Classify these A1c values into a grouped frequency distribution using the classes 3.7–4.7, 4.7–5.7, and so on.
b. What are the class midpoints for these classes?
c. Construct a frequency histogram of these data.

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