Table 3 The best estimating formula for an unknown distribution.
From: Estimating the mean and variance from the median, range, and the size of a sample
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 | |