(A) Mode matches with (IV) "Observation which has the highest frequency"
Mode is the value that appears most frequently in the data. This directly corresponds to the observation with the highest frequency.
(B) Median matches with (III) "Central value when observations are arranged in order"
Median is the middle value when all observations are sorted in ascending or descending order.
(C) Mean matches with (I) "Sum of all observations divided by their count"
Mean is calculated by adding all observations and dividing by the total number of observations.
(D) Standard Deviation matches with (II) "Measure of the spread from the mean"
Standard deviation quantifies how dispersed the data values are from the mean value.
The correct matching is:
(A) - (IV)
(B) - (III)
(C) - (I)
(D) - (II)