Question

For a certain data quartile deviation is 9 and e upper quartile is 80, find the lower quartile.

Answer 1

Answer:

Lower Quartile = 62

Step-by-step explanation:

We know the formula of quartile deviation as shown below:

Quartile Deviation = $\frac{Upper Quartile - Lower Quartile}{2}$

It is also given by semi quartile range.

or, Acc to the data given in the question,

Upper Quartile = 80.

Lower Quartile = ?

Therefore, 9 = $\frac{80 - Lower Quartile}{2}$

or, 80 - Lower Quartile = 18.

or, Lower Quartile = 80 - 18 = 62. [Ans]