1.

Which of the following does not change for the observations 23, 50, 27, 2x, 48, 59, 72, 89, 5x, 100, 120, when x lies between 15 and 20?

Answer»

Arithmetic mean
Range
MEDIAN
QUARTILE deviation

Solution :(i) Recall the properties of central tendencies.
(ii) For different values of x, AM, Median, and QD will be changed.
(iii) The maximum and MINIMUM values are not changed in the GIVEN interval of x.


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