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Assertion (a) coefficient of variation is an absolute measure of dispersion. reason (r) stratified sampling technique is unrestricted probability (random) sampl
Assertion (A) Coefficient of variation is an absolute measure of dispersion. Reason (R) Stratified sampling technique is unrestricted probability (random) sampling technique. Choices CHOICE (4) RESPONSE a. Both A and R are true butR is NOT the correct explanation of A Both A and R are true and R b. is the correct explanationn of A A is false but R is true C. d. A is true but R is false
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Priya gulani Best Answer
Types of Measures of Dispersion (1) Absolute Measures Absolute measures of dispersion are expressed in the unit of Variable itself. Like, Kilograms, Rupees, Centimeters, Marks etc. (2) Relative Measures Relative measures of dispersion are obtained as ratios or percentages of the average. These are also known as ‘Coefficient of dispersion.’ These are pure numbers or percentages totally independent of the units of measurements. Standard variation is an absolute measure of dispersion. When comparison has to be made between two series then the relative measure of dispersion, known as coeff.of variation is used. Stratified Random Sampling This method of sampling is sometimes used if there are wide variations in site performance within a certain geographic location or type of distribution site (i. e., health centers or schools). All the sites are grouped into segments, each having some uniform, easily identifiable characteristics. Each segment is sampled separately using unrestricted random sampling methods. so option c a is false but r is true