A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram
for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the
question. The blood pressure readings were given to the nearest whole number.
-What common class width was used to construct the frequency distribution?

Question

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram
for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the
question. The blood pressure readings were given to the nearest whole number. 
-What common class width was used to construct the frequency distribution?

Quizplus · Accepted Answer

The common class width in a frequency distribution is the difference between the upper limit of one class and the upper limit of the previous class (or the lower limit of one class and the lower limit of the previous class). It is consistent across all classes in a well-constructed frequency distribution. A class width of 10 is a common choice because it simplifies calculations and makes the distribution easier to understand.

A Nurse Measured the Blood Pressure of Each Person Who