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The average vecx and stanard deviation d...

The average `vecx` and stanard deviation `delta=sqrt(1/N sum_i f_i(x_i-overlinex)^2,)` where `sum_i=N` is the total number of students, `f_i` is the number of students having marks `x_i and sum_i` stand for summation. In an examination of 100 students for a 50-marks paper, the maximum score obtained was 44. Each students was awarded 6 additional marks and the resulting marks were scaled up to a total of 100 marks for the paper, Then

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