Table 3. Estimated variances of arithmetic mean and median methodsa.
4B7b | Meanc | Mediand (n missing) | Expected ratio of variancee |
1 | 2242 | 3039 (16) | 0.74 |
6 | 746 | 1010 (6) | 0.74 |
23 | 134 | 185 (7) | 0.72 |
94 | 4.5 | 6.1 (7) | 0.73 |
Variances were calculated in the condition where 20 mosquitoes from a single COM were dissected.
Concentration of 4B7 mAb in a feeder [µg/ml].
Variance of PIm when calculated using arithmetic mean.
Variance of PIm when calculated using median. The value “n missing” is the number out of 100,000 simulations with median = 0 in the control so that percent inhibition of a test could not be calculated.
Average of variance (SMFA using mean)/variance (SMFA using median) from 100,000 simulations. This many simulations ensures that we have 95% confidence that the estimates of the expected variance ratios are within 0.04 of their true values.