Suppose that 20% of students at high school A and 18% of students at high school B participate on a school athletic team. Indepe
ndent 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. Is the 10% condition met?
_____ because ___ is less than 10% of all students at high school A and 30 is ___ 10% of all students at high school B.
The standard deviation of ˆ p A − ˆ p B is approximately ______. The difference (high school A – high school B) in the ________ that participate on a school athletic team _______ varies by about ____ from the true difference in proportions of _____.
