Hello All

I have a population of 22000 individuals. I wanted to mesure a mean value of a specific parameter. for this purpose I randomly tested 24 individuals from the population.

For the begining I was calculated the mean, standard deviation and CV of all samples.

I want to calculate does the sample size is O.K. or should I increase the sampling.

NUM Parameter A AVERAGE STDEV CV
1 12539.0
2 21481.8 17010.4 6323.5 37.2
3 13670.6 15897.1 4869.4 30.6
4 9993.1 14421.1 4952.0 34.3
5 13090.7 14155.0 4329.6 30.6
6 14006.5 14130.3 3873.0 27.4
7 11552.5 13762.0 3667.3 26.6
8 11594.9 13491.1 3480.7 25.8
9 13256.9 13465.1 3256.8 24.2
10 13182.6 13436.8 3071.8 22.9
11 16764.6 13739.4 3082.1 22.4
12 10573.0 13475.5 3077.5 22.8
13 14123.2 13525.3 2952.0 21.8
14 11283.7 13365.2 2898.8 21.7
15 15661.4 13518.3 2855.5 21.1
16 13755.4 13533.1 2759.4 20.4
17 11747.0 13428.0 2706.6 20.2
18 10247.7 13251.4 2730.7 20.6
19 10293.6 13095.7 2739.2 20.9
20 11354.5 13008.6 2694.4 20.7
21 12903.3 13003.6 2626.3 20.2
22 10286.6 12880.1 2627.6 20.4
23 11099.9 12802.7 2593.9 20.3
24 11513.6 12749.0 2550.5 20.0


Thanks

Sirs