what is sampling bias what is the sampling bias example what is bias in sampling what is sample bias in sampling can a sample estimate a bigcup using a sampling tool how do i estimate bigcup b using a sampling test? can you estimate the value of bigcup without bias when sampling for set intersections which sample of the set intersects at the intersection? where does sampling bias occur what is the sample sample in bigcups why is sampling biased what is sample bias in sampling when sampling the elements in $a$, does the sampling for set intersections occur? what is the sampling bias what is bias sampling what is unbiased sampling where is bias sampled? which sampling technique is best for estimating set intersections in a set? what sample is needed to estimate $bigcup