Midpoint (Midvalue) of the class $15-30$ is ........
- A$20$
- B$17.5$
- C$22$
- D$22.5$
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Similar Questions
Find the median of the following frequency distribution:
Class $60-70$ $70-80$ $80-90$ $90-100$ $100-110$ $110-120$ Frequency $5$ $15$ $20$ $30$ $20$ $8$
| Class | $60-70$ | $70-80$ | $80-90$ | $90-100$ | $100-110$ | $110-120$ |
| Frequency | $5$ | $15$ | $20$ | $30$ | $20$ | $8$ |
Medium
View SolutionThe mean of the following data is $26.5$ and the total frequency is $60$. Find the missing frequencies $x$ and $y$.
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ Frequency $6$ $x$ $17$ $y$ $8$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ |
| Frequency | $6$ | $x$ | $17$ | $y$ | $8$ |
Medium
View SolutionThe mean of $10$ observations is $15.7$. If a new observation $19$ is included,the new mean is ..........
Easy
View SolutionIs it true to say that the mean,mode,and median of grouped data will always be different? Justify your answer.
Easy
View SolutionIn the formula $\bar{x} = A + \frac{\Sigma f_{i} d_{i}}{\Sigma f_{i}}$ for the mean,$d_{i} = \dots$
Easy
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