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En un conjunto de n valores de la variables X se sabe que: a. n Xi = 10 i=1 n X 2 i = 260
En un conjunto de n valores de la variables X se sabe que:
a. n Xi = 10
i=1
nX2i = 260
i=1
S2=25 halle n
b. n Xi = 140
i=1
n Xi2 = 1360
i=1
nS2=1280 halle n
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