Reference According to the U.S. Bureau of Justice Statistics, the proportion of children in grades 9 through 12 who reported having carried a weapon in the previous 30 days is alarmingly high. One researcher conducted a survey to estimate the percentage by gathering a representative sample of children in these grades from across the U.S. Out of the 7,435 students surveyed, 1,297 admitted to carrying a weapon in the last month. 1. What percentage of students admitted to carrying a weapon in the last month? In this lesson, we will consider three important sources of bias: non-response bias, selection bias, and response (or measurement) bias. 2. The survey described asked several questions about school violence in addition to the question about carrying weapons. An interesting fact about the data from this survey is that 439 students skipped the question on carrying weapons. a) Is it possible that people who skipped the question have something in common? If so, what might that be? Do we know this for sure? b) Which type of bias is present if a subgroup of the population declined to participate? c). Think about the true proportion of students who carried weapons in the 30 days prior to the