Average Calculator

Separate with commas, spaces or new lines.
One weight per value, in the same order. Only used for the weighted mean.
Used by the trimmed mean: 10 drops the lowest and highest 10% of the sorted values.
Selected average
5
Average Calculator
Arithmetic mean
5
Geometric mean
4.603216
Harmonic mean
4.201751
Quadratic mean (RMS)
5.385165
Median
4.5
Mode
4
Midrange
5.5
Trimmed mean
5
Number of values
8
Sum of the values
40
Smallest value
2
Largest value
9
Range
7
Sample standard deviation
2.13809
Population standard deviation
2
Worked out from NIST/SEMATECH e-Handbook of Statistical Methods §1.3.5.1 (measures of location) and §7.1.6 (mean, median, standard deviation) and 1 other source.

How this is worked out

3 steps
  1. Add the values: 2 + 4 + 4 + 4 + 5 + 5 + 7 + 9 = 40
  2. Divide by how many there are: 40 / 8 = 5
  3. Check: AM 5 >= GM 4.60321559605 >= HM 4.20175072947, as it must be for positive data.

Results are general information, not financial, tax, legal, medical or engineering advice.