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Table 2 Clustered lot quality assurance sampling plan used to evaluate yellow fever and measles vaccination coverage, Sierra Leone, 28–29 November 2009

From: Intervene before leaving: clustered lot quality assurance sampling to monitor vaccination coverage at health district level before the end of a yellow fever and measles vaccination campaign in Sierra Leone in 2009

N

d

%LT

%UT

Clusterskxn

SD range

% Alpha range

% Beta range

50

4

80

95

5x10

0-0.1

2-5

10-19

50

7

75

90

5x10

0-0.1

4-8

12-19

100

15

75

90

10x10

0-0.1

1-3

4-12

150

25

75

90

15x10

0-0.1

1-4

1-4

  1. N: lot sample size; d: decision value; LT: lower threshold; UT: upper threshold; k: number of clusters; n: cluster sample size; SD: standard deviation.
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BMC Public Health

ISSN: 1471-2458

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