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What is the class? width?

The class width is the width of each interval at which your data has been binned.

You can get the class with using

CW = lower bound2 - lower bound1

[which means the difference of any 2 lower bounds.]

Taking 32-36 and 37-41, we se that 32 and 37 are consecutive lower bounds.

Thus,

class width = 37 - 32 = 5 [ANSWER]