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Many researchers have used indirect question methods to study sensitive issues. Hence, researchers have made a lot of efforts on how to ask sensitive questions. Since the number of students of universities varied between and , the universities with higher number of students were allocated more clusters. According to the research carried out by Mohammadi et al. Published : 13 January Warner, for example, used randomized response RR models [ 9 ]. For some people, it means the beginning of sexual behaviors. There are two choices A and B below the questions. The low prevalence in this study to our study is attributed to age and sex, was conducted in high school boys.

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