Suppose you are conducting a survey regarding activity level of children in the la school district. you obtain a cluster sample of 16schols within the la school district and sample all sophomore students in the randomly selected schools. the survey is administered by the parents. the survey had bais (sample, response or nonresponse)

The survey had a sample and response bias. The survey only randomly selected sophomore students, when it needed to be a thorough survey of children in the LA school district, so the sample size is neither large enough or relevant. Secondly, because the survey was administered by the parents of the students, the students surveyed will be more likely to over-report their activity level.