Table 3

The best estimating formula for an unknown distribution.

Sample Size:

n ≤ 15

15 <n ≤ 25

25 <n ≤ 70

70 <n

Estimate Mean

Formula (5)

Median

Estimate Standard Deviation

Formula (16)

Range/4

Range/6

Hozo et al. BMC Medical Research Methodology 2005 5:13   doi:10.1186/1471-2288-5-13