High School

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There are 2 large high schools in a district, each with over 2000 students. The superintendent wants to compare the proportion of students at each school who have been involved in a car accident while they were the driver. At School A, the superintendent randomly selects 50 students and finds that 4 have been in an accident. At School B, the superintendent randomly selects 65 students and finds that 8 have been in an accident.

Which of the following conditions for constructing a two-sample confidence interval is not met?

I. Random
II. 10%
III. Large Counts

(a) I only
(b) II only
(c) III only
(d) I and II
(e) II and III

Answer :

I think a c or d I’m not sure

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