Question

1. The measure of dispersion which uses only two observations is called:
(a) Mean
(b) Median
(c) Range
(d)
8. The measure of dispersion which uses only two observations is called:
(a) Range (b) Quartile deviation (c) Mean deviation
(d​

Answer 1

The measure of dispersion which uses only two observations is called range.

• The formula for mean is the sum of observations ÷ number of observations. Here the data does not have only two observations.
• The median is the middlemost term and uses all the terms of data to find the same.
• The formula for the range is the highest value - lowest value. Therefore the range is the only measure of dispersion that uses only two observations.

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Answer 2

Answer:

The measure of dispersion that uses only two observations is called Range.

Explanation:

• In statistics, the range is the difference between the greatest and lowest values in a collection of data.
• The mean is calculated using the total of observations divided by the number of observations. The data does not simply have two observations in this case.
• The median is the middle term, and it is calculated by combining all data terms. Here also the data does not use only two observations.
• Therefore range uses only two observations because it only relies on two observations.
• It's ideal for displaying the dispersion of small data sets.

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