We left in suspense until the local sample group large enough to run a test of proportions. As a minimum, the n *p (sample size times the percent positives) should be greater than 5. If the proportion of positives in our local county population remains at 6%, we will have to wait until 85 people are tested. If the proportion of positives increases toward the statewide level, then we only need about 29 samples to perform the test.