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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