Mathematics, 08.06.2021 23:00 coryintheswamp

If X is normal with mean 9 and variance o2 where P ( X > 7.5 ) = 0.7734 Then standard deviation of X is?

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If X is normal with mean 9 and variance o2 where P ( X > 7.5 ) = 0.7734 Then standard deviation o...