Table 1.
The average, range, standard deviation, and coefficient of variation of the 14 mineral compounds in spinach
| Mineral compound | No. sample | Average (ppm) | Minimum (ppm) | Maximum (ppm) | Range (ppm) | Standard deviation | Stdev error | CV(%) |
|---|---|---|---|---|---|---|---|---|
| K | 275 | 79,576.06 | 47,170.00 | 108,935.36 | 61,765.37 | 11,903.06 | 43.28 | 14.96 |
| Mg | 292 | 8697.34 | 4921.23 | 14,293.27 | 9372.04 | 1443.39 | 4.94 | 16.60 |
| P | 292 | 6748.91 | 4004.33 | 10,210.77 | 6206.44 | 952.55 | 3.26 | 14.11 |
| Ca | 292 | 6400.55 | 3043.91 | 11,544.80 | 8500.89 | 1511.40 | 5.18 | 23.61 |
| S | 292 | 4281.57 | 1899.60 | 7462.84 | 5563.23 | 782.93 | 2.68 | 18.29 |
| Na | 292 | 615.76 | 186.94 | 1484.01 | 1297.07 | 214.52 | 0.73 | 34.84 |
| Zn | 292 | 102.50 | 31.43 | 386.82 | 355.38 | 78.97 | 0.27 | 77.04 |
| Mn | 292 | 83.20 | 29.78 | 415.76 | 385.97 | 79.00 | 0.27 | 94.95 |
| Fe | 291 | 74.34 | 50.43 | 138.58 | 88.15 | 13.57 | 0.05 | 18.25 |
| B | 269 | 30.47 | 17.07 | 52.36 | 35.29 | 5.93 | 0.02 | 19.47 |
| Cu | 292 | 6.86 | 2.22 | 10.97 | 8.75 | 1.25 | 0.00 | 18.16 |
| Mo | 292 | 2.36 | 0.20 | 8.62 | 8.42 | 1.29 | 0.00 | 54.96 |
| Ni | 288 | 0.72 | 0.23 | 4.23 | 4.00 | 0.48 | 0.00 | 66.29 |
| Co | 238 | 0.15 | 0.05 | 0.46 | 0.42 | 0.08 | 0.00 | 54.01 |