| 
   
  | Low Level | Donor 1 | Donor 2 | Donor 3 | Donor 4 | Donor 5 | Donor 6 |  
  | Rep 1 | 32 | 35 | 39 | 24 | 30 | 24 |  
  | Rep 2 | 28 | 33 | 39 | 25 | 32 | 24 |  
  | Rep 3 | 32 | 34 | 42 | 23 | 34 | 24 |  
  | Mean | 31 | 34 | 40 | 24 | 32 | 24 |  
  | S.D. | 2 | 1 | 2 | 1 | 2 | 0 |  
  | %RSD | 7% | 4% | 5% | 5% | 6% | 1% |  
  | Measured Hematocrit | 29 | 34 | 36 | 25 | 32 | 27 |  
  | % Difference from Measured | 6% | 0% | 11% | -6% | 0% | -11% |  
  | Normal Level | Donor 1 | Donor 2 | Donor 3 | Donor 4 | Donor 5 | Donor 6 |  
  | Rep 1 | 49 | 52 | 50 | 39 | 47 | 37 |  
  | Rep 2 | 49 | 49 | 48 | 38 | 45 | 38 |  
  | Rep 3 | 48 | 54 | 52 | 41 | 50 | 35 |  
  | Mean | 49 | 51 | 50 | 39 | 47 | 36 |  
  | S.D. | 0 | 2 | 2 | 2 | 2 | 1 |  
  | %RSD | 1% | 5% | 4% | 4% | 5% | 4% |  
  | Measured % Hematocrit | 46 | 51 | 50 | 38 | 48 | 41 |  
  | % Difference from Measured | 6% | 1% | 0% | 4% | -2% | -11% |  
  | High Level | Donor 1 | Donor 2 | Donor 3 | Donor 4 | Donor 5 | Donor 6 |  
  | Rep 1 | 76 | 64 | 71 | 65 | 58 | 69 |  
  | Rep 2 | 69 | 73 | 73 | 70 | 68 | 67 |  
  | Rep 3 | 64 | 79 | 68 | 64 | 59 | 61 |  
  | Mean | 69 | 72 | 70 | 66 | 62 | 66 |  
  | S.D. | 6 | 8 | 3 | 3 | 6 | 4 |  
  | %RSD | 9% | 11% | 4% | 5% | 9% | 6% |  
  | Measured % Hematocrit | 66 | 71 | 71 | 68 | 67 | 68 |  
  | % Difference from Measured | 5% | 0% | -1% | -3% | -8% | -4% |  |