Interval Level

#1
Game Theory

Could anybody help with game theory in accordance to penetrating a market? Thank you for your answers!
 
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#2
Hey, I'm writing an essay on stevens and wilkinsons papers about the theory of measurements. Could anyone help with the following question?

Why or in what sense is a measurement on the interval level a necessary and sufficient condition for the variance being considered a meaningful statistic.

Thank you for your help!

If you look at the definition of interval scale, and if you look at the definition of variance, and you also look at the definition of lower order scales (nominal, ordinal), this should be rather obvious. Just think it through and you´ll work it out. :) You have to try. Here´s a clue though: "equal distances".