norman

1. Personas en la uni que no terminan.
x P(x) xp(x) x^2 x^2*p(x)
1 0 0 1 0
2 0.025 0.05 4 0.1
3 0.2 0.6 9 1.8
4 0.02 0.1 16 0.32
M=Σ[x*p(x)]
5 0.019 0.095 25 0.475
6 0.1 0.6 36 3.6
σ^2=Σ[x^2*p(x)]-M^2
7 0.198 1.386 49 9.702
σ^2=51.524-(6.494)^2
8 0.065 0.52 64 4.16
σ^2=51.52-42.172036
9 0.007 0.063 81 0.567
σ^2=9.348
10 0.165 1.65 100 16.5
σ=: √9.348
11 0.13 1.43 110 14.3
σ=3.05
12 0 0 144 0
Suma T= 0.929 6.494 639 51.524