"somewhat uncertain" is the actual quote. And further "Using this as the probability of randomly drawing a star in the clump area, the bionomial distribution y

"somewhat uncertain" is the actual quote. And further "Using this as the probability of randomly drawing a star in the clump area, the bionomial distribution yields a probability of randomly drawing at least 12 stars in the clump out of 15 in the Paper I field of 0.07." That I believe is approx 1 in 20 of seeing the observed distribution. Suggestive.