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Exercise - 3.12 Marriage duration - Variance and standard deviation
# Vul getallen in na <- of tussen de komma's in c(...); typ tekst tussen "".
# Gebruik een punt (.) als decimaalteken, niet een komma (,). Zet geen komma na het antwoord.
huwelijksduren <- c(240, 144, 143, 72, 30, 26, 2, 150, 14, 150, 1657)
sum_of_squares <-
variantie <-
standaardafwijking <-