Answer all 4 questions please uTake Test: nent E1 - ic p a large city school sys

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Answer all 4 questions please uTake Test: nent E1 - ic p a large city school system with 32 elementary schools (grades 1-5), the school board is considering the adoption of a new policy that would require Summer · C 20. xe Take Test: El-Summer 20., w e lementary students to pass a test in order to be promoted to the next grade. The PTA wants to find out whether parents agree with this plan. hey send a notice to each home and ask people to contact the PTA and record their opinions. ndicate the type of sampling strategy involved. O This sampling strategy is systematic sampling O This sampling strategy is voluntary sampling O This sampling strategy is an attempt at a census O This sampling strategy is SRS O This sampling strategy is convenience sampling UESTION 15 3 points Save Answer A clinical trial is planned for AIDS patients to investigate whether a new treatment provides improved survival over the current standard treatment. It is not known if it will be better or worse. The control group is: 0 a. the group that receive the placebo treatment. O b. the group that receives the cu O b the group that receives the current standard treatment. c, there is no control group. () d, the group that receives the new, treatment.

Explanation / Answer

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Voluntary sample. Only those who both see the ad and feel strongly enough will respond.

So, option B

A voluntary sample is one of the main types of non-probability sampling methods. A voluntary sample is made up of people who self-select into the survey. Often, these folks have a strong interest in the main topic of the survey. Suppose, for example, that a news show asks viewers to participate in an on-line poll.

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