Question
Find the actual lower class limits, upper$-$class limits and the mid$-$values of the classes:$10 - 19, 20 - 29, 30 - 39$ and $40 - 49.$
✓
Answer
| $C. I.$ | Exclusive $C. I.$ |
| $10 - 19$ | $9.5 - 19.5$ |
| $20 - 39$ | $19.5 - 29.5$ |
| $30 - 39$ | $29.5 - 39.5$ |
| $40 - 49$ | $39.5 - 49.5$ |
$\frac{9.5+19.5}{2}=14.5$
In case of frequency $19.5 - 29.5$ the lower class limit is $19.5,$ the upper class limit is $29.5$ and mid$-$value is
$\frac{19.5+29.5}{2}=24.5$
In case of frequency $29.5 - 39.5$ the lower class limit is $29.5,$ the upper class limit is $39.5$ and mid$-$value is
$\frac{29.5+39.5}{2}=34.5$
In case of frequency $39.5 - 49.5$ the lower class limit is $39.5$, the upper class limit is $49.5$ and mid$-$value is
$\frac{39.5+49.5}{2}=44.5$
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