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Table 2 Results of our meta-analysis with the real sample data as one subgroup, and our estimates of the sample as the second subgroup.

From: Estimating the mean and variance from the median, range, and the size of a sample

 

Actual Sample

Our Estimate

 

WMD [95% CI]

% Weight

WMD [95% CI]

% Weight

Pooled WMD

-0.37 [-37.17, 36.44]

42.00

0.41 [-30.92, 31.73]

58.00

Overall pooled WMD

0.08

100.00

 

Heterogeneity statistic

degrees of freedom

P

I-squared

Sample

0.04

9

1.000

0.0%

Estimate

0.04

9

1.000

0.0%

Overall

0.08

19

1.000

0.0%

Overall Test for heterogeneity between sub-groups

 

0.00

1

0.975

 

Significance test(s) of WMD = 0

Sample

z = 0.02

p = 0.984

  

Estimate

z = 0.03

p = 0.980

  

Overall

z = 0.01

p = 0.995

  1. 1I-squared: the variation in WMD attributable to heterogeneity