Odpowiedź:
x = [tex]\frac{1 + 2*2 + 3*3 + 4*4}{10} = \frac{30}{10} = 3[/tex]
σ² = [tex]\frac{( 1 - 3)^2 + 2*(2 - 3)^2 + 3*(3 - 3)^2 + 4*(4 - 3)^2}{10} =[/tex] [tex]\frac{4 + 2 + 0 + 4}{10} = 1[/tex]
więc
σ = [tex]\sqrt{1} = 1[/tex]
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Odpowiedź:
x = [tex]\frac{1 + 2*2 + 3*3 + 4*4}{10} = \frac{30}{10} = 3[/tex]
σ² = [tex]\frac{( 1 - 3)^2 + 2*(2 - 3)^2 + 3*(3 - 3)^2 + 4*(4 - 3)^2}{10} =[/tex] [tex]\frac{4 + 2 + 0 + 4}{10} = 1[/tex]
więc
σ = [tex]\sqrt{1} = 1[/tex]
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Szczegółowe wyjaśnienie: