Question

The below data show the weight (in lb) of $28$ students in a class.


Which of the following is false?

• A. $4$ students have weight in $45\le \text{W}\le 54$.
• B. $12$ students have weight in $55\le \text{W}\le 64$
• C. $7$ students have weight in $65\le \text{W}\le 74$
• D. $4$ students have weight in $75\le \text{W}\le 84$

Answer 1

The correct option is D $4$ students have weight in $75\le \text{W}\le 84$

The grouped frequency table using $4$ bins of interval length $10$ each can be denoted as


From the above grouped frequency table, it is clear that $5$ students have the weight in the interval $75\le W\le 84$. Hence, option (d.) is incorrect.