The upper quartile for the following distribution is given by the size of:
Size of Item $1$ $2$ $3$ $4$ $5$ $6$ $7$ Frequency $2$ $4$ $5$ $8$ $7$ $3$ $2$
| Size of Item | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ |
| Frequency | $2$ | $4$ | $5$ | $8$ | $7$ | $3$ | $2$ |
- A$\left( \frac{31 + 1}{4} \right)^{th}$ item
- B$\left[ 2\left( \frac{31 + 1}{4} \right) \right]^{th}$ item
- C$\left[ 3\left( \frac{31 + 1}{4} \right) \right]^{th}$ item
- D$\left[ 4\left( \frac{31 + 1}{4} \right) \right]^{th}$ item
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The following data gives the distribution of height of students:
Height (in $cm$) $160$ $150$ $152$ $161$ $156$ $154$ $155$ No of students $12$ $8$ $4$ $4$ $3$ $3$ $7$
The median of the distribution is:
| Height (in $cm$) | $160$ | $150$ | $152$ | $161$ | $156$ | $154$ | $155$ |
| No of students | $12$ | $8$ | $4$ | $4$ | $3$ | $3$ | $7$ |
The median of the distribution is:
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View SolutionThe arithmetic mean of the following discrete data $12, 14, 20, 23, 25, 32$ is given by
The average age of a teacher and three students is $20$ years. If all the students are of the same age and the difference between the teacher's age and the age of one of the students is $20$ years,find the teacher's age in years.
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View SolutionIn a data,if the number $i$ is repeated $i$ times for $i=1, 2, \ldots, n$,then the mean of the data is
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