निम्नलिखित भारित सूचकांकों में से किसे गणितीय रूप से 'आदर्श सूचकांक' माना जाता है क्योंकि यह समय उत्क्रमणीयता और तत्व उत्क्रमणीयता दोनों परीक्षणों को संतुष्ट करता है?

Consider the following types of data: 1. Primary Data 2. Secondary Data Government publications are classified as an example of which of the above?

The sum of deviations taken from the arithmetic mean of a statistical series is always:

The Karl Pearson's coefficient of correlation can be computed between: