CBSE Class 11 Economics VBQs Measures of Dispersion

Very Short Answer Type Questions

Question. Calculate range 22, 35, 32, 45, 42, 48, 39
Answer :  Range = Largest value Smallest value
= 48 22
= 26

Question. Give the meaning of dispersion.
Answer :  Dispersion is a measure of the variation of the item from a central value.

Question. Which measure of dispersion covers middle 50% of the items?
Answer : Inter quartile range

Question. What do you mean by relative measure of dispersion?
Answer :  Relative measures are expressed in ratios or percentage, also known as coefficients of dispersion.

Question. Write two demerits of range.
Answer :  Demerits of range
(i) It is not based on all the observation of series.
(ii) It is very much affected by extreme items.

Question. What is meant by central tendency?
Answer : A Single figure that represents the whole series is known as central Tendency.

Question. Name any two partition values.
Answer : (i) Quartile (ii) Decile (iii) Percentile

Question. Define mode.
Answer : The value which occurs most frequently in series is known as mode.

Question. Which partition value divide the total set of values into four equal parts.
Answer : Quartile

Question. A shoes manufacturing company only manufactures shoes for adults. Company wants to know the most popular size. Which type of central tendency will be the most appropriate?
Answer : Mode

Question.  Mention one demerit of mode.
Answer : One demerit of mode is that it is not capable of algebraic treatment.

Question. Calculate mode from the following data 10, 8, 10, 6, 4, 12, 10, 8, 10,
18, 16, 10, 18, 10, 10.
Answer : Mode = 10

Question. What is positional average?
Answer : Those averages whose value is worked out on the basis of their position in the statistical series.