Mathematics, 12.01.2020 10:31, JOEREACH
Suppose that 20% of students at high school a and 18% of students at high school b participate on a school athletic team. independent random samples of 30 students from each school are selected and asked if they participate on a school athletic team. let ˆ p a represent the sample proportion of students at school a who participate on a school athletic team and ˆ p b represent the sample proportion of students at school b who participate on a school athletic team.
what is the mean of the sampling distribution of ˆ p a − ˆ p b ?
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