In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. give examples of population members that might have been omitted. the population consists of all 250 students in your large statistics class. you plan to obtain a simple random sample of 30 students by using the sampling frame of students present next monday. here is how i see it. there might not be all 250 students in class on that monday. is that what they mean by under coverage?