Answer to Question #164926 in Statistics and Probability for luis

Question

12 – 18

Class Boundaries

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Midpoint

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Width

Answer 1

Lower Class Boundary: The lower class boundary is the average of the lower limit of that class and the upper limit of previous class.

Upper Class Boundary: The upper class boundary of a class is the average of the upper limit of that class and lower limit of the next class.

Mid Point: The mid-point is the average of the class-boundaries of that class.

Width: The difference between upper and lower boundaries of a class is called width of that class.

Class Boundaries:

$11.5- \frac{18+56}{2} = 11.5- 37$

Midpoints:

$\frac{11.5+37}{2}=24.25$

Widths:

$37 -11.5 = 25.5$