What is meant by mean deviation? What are the methods to calculate it? Give its merits and demerits.

What is meant by mean deviation? What are the methods to calculate it?

1.	What is meant by mean deviation? What are the methods to calculate it? Give its merits and demerits.
Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/mean-1091459" style="font-weight:bold;" target="_blank" title="Click to know more about MEAN">MEAN</a> deviation is the arithmetic average of the deviations of all the values taken from some average value (mean, <a href="https://interviewquestions.tuteehub.com/tag/median-1092401" style="font-weight:bold;" target="_blank" title="Click to know more about MEDIAN">MEDIAN</a>, mode) of the series, ignoring signs ( + or - ) of deviations.<br/>Merits :- <br/>1. SImple.<br/>2. <a href="https://interviewquestions.tuteehub.com/tag/based-389387" style="font-weight:bold;" target="_blank" title="Click to know more about BASED">BASED</a> on all values.<br/>3. <a href="https://interviewquestions.tuteehub.com/tag/less-1071906" style="font-weight:bold;" target="_blank" title="Click to know more about LESS">LESS</a> effect on <a href="https://interviewquestions.tuteehub.com/tag/extreme-981946" style="font-weight:bold;" target="_blank" title="Click to know more about EXTREME">EXTREME</a> Values.<br/>Demerits :- <br/>1. Inaccuracy.<br/>2. Not capable of Algebraic Treatment.<br/>3. Unreliable.</body></html>