Ναι, κι εγώ πιστεύω ότι είναι λάθος γιατί υπολογίζει την αυτοδιασπορά και όχι την αυτοσυσχέτιση. Δεν είναι όμως 2 η διακύμανση. Το σ_u^2=1/(1-α^2) και το σ_v^2=1/(1-β^2)
Όντως, δίκαιο έχεις. Αντί για 2 θέλει το άθροισμα αυτών των 2|
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