Correct answer
A. Cluster sampling
Explanation
The correct answer is Cluster sampling.
For a certain distribution if ∑(x−2)=18,∑(x−24)=0,∑(x−28)=−24) then arithmetic mean is________?
Second moment about mean is________?
When data are collected in a statistical study for only a portion or subset of all elements of interest we are using?
If in a coin P(H) = 2P(T) then prob. of head is ________?
In symmetrical distribution, the co-efficient of skewness is equal to ________?
The smallest and the largest value of any given class of a frequency distribution are called ________?