(Answered) Calculate the standard deviation of the energy for a

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Calculate the standard deviation of the energy for a particle in a state, which is a superposition of two stationary states with coefficients c1 and c2.

Do this calculation in two ways:

(i) using the wave function of this state and a standard deviation of quantum mechanical averages, and

(ii) using the probabilistic interpretation of the coefficients c1 and c2. Did you get the same results?

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