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20 March, 18:45

Suppose your local school district decides to randomly test high school students for attention deficit disorder (ADD). There are there high schools in the district, each with grades 9-12. The school board pools all of the students together and randomly samples 250 students. Is this a simple random sample?

a. Yes, because the students were chosen at random

b. Yes, because each student is equally likely to be chosen

c. Yes, because they could have chosen any 250 students from throughout the district

d. No, because we can't guarantee that there are students from each school in the sample

e. No, because we can't guarantee that there are students from each grade in the sample

f. Yes, because they could have chosen any 250 students from throughout the district

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Answers (1)
  1. 20 March, 19:06
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    Option C is correct. Option f is the same as option C

    Step-by-step explanation:

    From the question, There are three high schools in the district, each with grades between nine to twelve. The school board decided to pool all of the students together and randomly samples 250 students in the whole district that has schools between the grade of nine to twelve.

    In order to test for high school students in the district for Attention Deficit disorder (ADD), they could have chosen any 250 students from any school with grades betweem nine to twelve throughout the district.
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