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Calculated and tabulated t‐and F‐values for the estimation of accuracy of the proposed method
| Coffee sample ID | Trigonelline | Caffeine | Ftabulated for α = 0.05, v1 = 2 and v2 = 2 | Ttabulated for α = 0.05 and 4 degree of freedom | ||
|---|---|---|---|---|---|---|
| F ‐calculated | T ‐calculated | F ‐calculated | T ‐calculated | |||
| A | 3.45 | 1.34 | 1.47 | 0.75 | 19 | 2.78 |
| B | 1.00 | 0.60 | 1.13 | 1.41 | ||
| C | 2.89 | 0.79 | 1.36 | 0.76 | ||
