| Marks | 5 – 7 | 8 – 10 | 11 – 13 | 14 – 16 | 17 – 19 | 20 – 22 |
| Frequency | 4 | 7 | 26 | 41 | 14 | 8 |
The table above shows the marks obtained by 100 pupils in a test. Find the upper class boundary of the class containing the third quartile.
-
A.
13.0 -
B.
16.0 -
C.
16.5 -
D.
22.5
Correct Answer: Option C
Explanation
The third quartile can be found in the ((frac{3N}{4})^{th}) position
= ((frac{3 times 100}{4})^{th}) position
This is found in the class 14 – 16.
The upper class boundary = 16.5