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Table 2 Number of Bonferroni adjusted p-values of t-tests below conventional thresholds. Reading example for the first two lines: (17+2) t-tests corresponds to p-values less or equal 0.05 after correcting for multiple tests. After weighting, (8+4) t-tests still show p-values less or equal 0.05

From: Health estimate differences between six independent web surveys: different web surveys, different results?

Comparison

\(\boldsymbol{p} \boldsymbol{\le} \boldsymbol{.001}\)

\(\boldsymbol{p} \boldsymbol{\le} \boldsymbol{.01}\)

\(\boldsymbol{p} \boldsymbol{\le} \boldsymbol{.05}\)

\(\boldsymbol{p} \boldsymbol{>} \boldsymbol{.05}\)

PS-1 vs NPS (unweighted)

17

0

2

17

PS-1 vs NPS (weighted)

8

4

0

24

PS-2 vs NPS (unweighted)

8

0

0

6

PS-2 vs NPS (weighted)

6

1

0

7