Quiz Question 2
A researcher did an anonymous survey with students in a mixed-gender middle school to learn the health and diet patterns of middle school students in the entire country. What type of bias could it introduce?
本练习是课程的一部分
A researcher did an anonymous survey with students in a mixed-gender middle school to learn the health and diet patterns of middle school students in the entire country. What type of bias could it introduce?
本练习是课程的一部分