Question

Given minimum and maximum data entries and the number of classes min = 75, max = 280, 10 classes. Write the first five lower class limit.

Answer 1

The lower class limit is simply the least data element that can enter a class.

The first five lower class limits are: 75 , 96, 117, 138 and 159

The given parameters are:

$\mathbf{Min = 75}$

$\mathbf{Max = 280}$

$\mathbf{Class = 10}$

Calculate the range

$\mathbf{Range = Max - Min}$

$\mathbf{Range = 280 - 75}$

$\mathbf{Range = 205}$

Divide by the number of classes, to determine the class width

$\mathbf{n =\frac{205}{10}}$

$\mathbf{n =20.5}$

Approximate

$\mathbf{n =21}$

So, the lower limits are:

$\mathbf{Lower = 75 \times 0, 75 + 21 \times 1, 75 + 21 \times 2, 75 + \times 3, 75 + \times 4}$

$\mathbf{Lower = 75 , 96, 117, 138 , 159}$

Hence, the first five lower class limits are: 75 , 96, 117, 138 and 159

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