सांख्यिकीय डेटा के रूप में अपनी परिभाषा में, सांख्यिकी निम्नलिखित में से किसके साथ व्यवहार नहीं करती है?

Consider the following statements regarding Normal Distribution: 1. Mean ± 2σ covers 95.45% of the area. 2. First and third quartiles are equidistant from the median. 3. The height of the normal curve is at its maximum at the mode. Choose the correct statements:

A statistical measure in a regression model that determines the proportion of variance in the dependent variable explained by the independent variable(s) is the: