निम्नलिखित गैर-प्रचालक परीक्षणों (Non-parametric tests) में से किसका कोई संगत प्रचालक समकक्ष परीक्षण (Parametric counterpart test) नहीं है?

Which of the following statements are true regarding measures of dispersion? A. Range is affected by extreme values B. Standard deviation considers all observations C. Quartile deviation is a positional measure of dispersion D. Variance is expressed in the original units of data

The sampling procedure in which groups or units are selected from various departments in an organization to form representative committees for decision-making on product development, budget allocations, and marketing strategies is best described as: