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Table 5 Example for equation 7

From: Measurement error adjustment in essential fatty acid intake from a food frequency questionnaire: alternative approaches and methods

Obs. i

Error-prone var. (Q1 = W1)

Replicate (Q2 = W2) (M = W2)

Replicate 2...k (Q3 = W3) (N = W3)

Non-error prone var. (Z)

Y

1

1.02

1.05

1.10

55

0

2

0.80

Missing

0.65

60

1

3

1.50

Missing

Missing

62

0

...

...

...

...

...

...

n

nQ1 = 7,814

nM = 2,251

nN = 2,251

nZ = nY = 7,814

 
  

nQ2 = 657

nQ3 = 7,482

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