Weight ($x$ kg) in class intervals |
Frequency | Cumulative Frequency |
---|---|---|
$\phantom{30 \le}\; x \lt \color{red}{40}$ | $0$ | $\color{red}{0}$ |
$40 \le x \lt \color{red}{50}$ | $10$ | $\color{red}{10}$ |
$50 \le x \lt \color{red}{60}$ | $18$ | $\color{red}{28}$ |
$60 \le x \lt \color{red}{70}$ | $13$ | $\color{red}{41}$ |
$70 \le x \lt \color{red}{80}$ | $15$ | $\color{red}{56}$ |
$80 \le x \lt \color{red}{90}$ | $4$ | $\color{red}{60}$ |