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A data set of the age of a sample 275 gallopicus tortillas has a minimum value of one year and a maximum value of 95 years suppose we want to group these data into 5 classes of equal width assuming we take the lower limit at the 1st class as 1 year determined the class limit boundaries and mid point of the group quantitative data table

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\text{class width=}(95-1)/(5)=(94)/(5)=18.8\approx19

Therefore,


\text{class mid point=}\frac{lower\text{ class limit + upper class limit}}{2}

A data set of the age of a sample 275 gallopicus tortillas has a minimum value of-example-1
User Gerrit Zijlstra
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