Question 1

Which of the following is a positional average?

Accepted Answer

Median is a positional average because its value depends upon the position of the item in the given series when arranged in ascending or descending order.

Question 2

The sum of deviations of all observations taken from their arithmetic mean is always:

Accepted Answer

The algebraic sum of deviations of all observations from their arithmetic mean is always equal to zero.

Question 3

Which average is most affected by extreme values?

Accepted Answer

Arithmetic mean is most affected by extreme values because every single observation in the data set is used in its calculation.

Question 4

Which of the following partition values divides the series into four equal parts?

Accepted Answer

Quartiles divide the total series into four equal parts, with three quartile points: Q1, Q2, and Q3.

Question 5

Mode can be easily determined graphically using:

Accepted Answer

Mode is determined graphically with the help of a histogram by drawing cross lines from the highest rectangle and its adjacent rectangles.

Measures of Central Tendency