the dean of students at a large college is interested in learning about their opinions regarding the…

the dean of students at a large college is interested in learning about their opinions regarding the percentage of first - year students who should be given parking privileges in the main lot. he sends out an email survey to all students about this issue. a large number of first - year students reply but very few sophomores, juniors, and seniors reply. based on the responses he receives, he constructs a 90% confidence interval for the true proportion of students who believe first - year students should be given parking privileges in the main lot to be (0.71, 0.79). which of the following may have an impact on the confidence interval, but is not accounted for by the margin of error?\nresponse bias\nnonresponse bias\nsampling variation\nundercoverage bias

the dean of students at a large college is interested in learning about their opinions regarding the percentage of first - year students who should be given parking privileges in the main lot. he sends out an email survey to all students about this issue. a large number of first - year students reply but very few sophomores, juniors, and seniors reply. based on the responses he receives, he constructs a 90% confidence interval for the true proportion of students who believe first - year students should be given parking privileges in the main lot to be (0.71, 0.79). which of the following may have an impact on the confidence interval, but is not accounted for by the margin of error?\nresponse bias\nnonresponse bias\nsampling variation\nundercoverage bias

Answer

Brief Explanations:

  1. Response bias: This occurs when respondents answer questions in a way that is systematically different from the truth. But it's not the main issue here related to the non - accounted factor for the confidence interval.
  2. Non - response bias: Since very few sophomores, juniors, and seniors reply while a large number of first - year students do, the non - respondents (sophomores, juniors, and seniors) may have different opinions. This bias is not accounted for in the margin of error which only accounts for sampling variability.
  3. Sampling variation: The margin of error is designed to account for sampling variation, so this is not the correct answer.
  4. Undercoverage bias: There is no indication that any group is not included in the sampling frame; all students were sent the email. So this is not the case.

Answer:

nonresponse bias