RESEARCH METHODOLOGY

Detailed explanation-1: -To find the interquartile range (IQR), first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.

Detailed explanation-2: -The median of data values below the median represents Q1. The median of data values above the median value represents Q3. Finally, we can subtract the median values of Q1 and Q3. The resulting value is the interquartile range.

Detailed explanation-3: -interquartile range, IQR = Q3-Q1 = 2. lower 1.5*IQR whisker = Q1-1.5 * IQR = 7-3 = 4. (If there is no data point at 4, then the lowest point greater than 4.) upper 1.5*IQR whisker = Q3 + 1.5 * IQR = 9 + 3 = 12. (If there is no data point at 12, then the highest point less than 12.)