Formler Flashcards
1
Q
Medelvärde
A
x̄ = Σx/n
2
Q
Kvartilavvikelse
A
Q = q3 - q1 / 2
3
Q
Varians
A
s² = Σ(x - x̄)² / n - 1
4
Q
Standardavvikelse
A
s = √ Σ(x - x̄)² / n - 1
5
Q
Variationskoefficientv
A
v = s / x̄
6
Q
z-poäng
A
z = x - x̄ / sx
7
Q
Pearsons korrelationskoefficient
A
r = Σ zx zy / n - 1
8
Q
Medelfelet
A
σx̄ = σx / √n
9
Q
Z-test
A
z = x̄ - µx / (σx / √n)
10
Q
Cohens
A
d = µ1 - µ0 / σ
11
Q
Regressionslinjen
A
ŷ = b0 + b1x
12
Q
Regressionskoefficienten
A
b1 = r x sy/sx
13
Q
Intercept
A
b0 = y̅ - b1x̄
