Measures of Dispersion
If the observations of a variable X are, -4, -20, -30, -44 and -36, then the value of the range will be:
-48
40
-40
48
40
Range =L-S
Where L is the largest value and S is the smallest value.
Here, L=-4 and S = -44
Hence, range =(-4) -(-44)
40
Therefore the range of these observations is 40.
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Which measure of dispersion can be computed in case of openend classes?A. Standard deviation
B. Range
C. Quartile deviation
D. Coefficient of variation
The scatter in a series of values about the average is called:
A. Central tendency
B. Dispersion
C. Skewness
D. Symmetry
The sum of absolute deviations is minimum if these deviations are taken from the:
A. Mean
B. Mode
C. Median
D. Upper quartile
Study of scatteredness of observations is known as :
A. Measure of dispersion
B. Standard deviation
C. Measure of central tendency
D. None of the above
If there are many extreme scores on all examination, the dispersion is:
A. Large
B. Small
C. Normal
D. Symmetric
The measure of dispersion which is expressed in terms of the nits of observations:
A. Absolute measure
B. Variance
C. Relative measure
D. None of the above
The standard deviation is independent of:
A. Change of origin
B. Change of scale of measurement
C. Change of origin and scale of measurement
D. Difficult to tell
2 responses to “If the observations of a variable X are, -4, -20, -30, -44 and -36, then the value of the range will be:”
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No correct answer is 40 as
-4-(-44)=40-
corrected
-
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