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Mathematics 9 Online
OpenStudy (anonymous):

Need help with some algebra questions please!

OpenStudy (anonymous):

I may be able to help you.

OpenStudy (anonymous):

A study of a new medication found that patients who took the medicine have reduced blood pressure, compared to those who did not take the medicine. The research team concluded that the medicine caused the reduction in blood pressure. Which study design did they most likely use? A. They most likely used an experiment with patients randomly assigned to take the medicine or not take the medicine. B. They most likely used an experiment with patients randomly assigned to groups based on their blood pressure. C. They most likely used a survey asking patients if they took the medicine and how their blood pressure was affected. D. They most likely used a survey asking patients if they took the medicine and if they felt the medication helped their blood pressure.

OpenStudy (anonymous):

I believe it's C

OpenStudy (anonymous):

Thank you! Can you help me with another?

OpenStudy (anonymous):

Angie, a student in an advanced statistics course, was given an algebra test and she scored 80%. Is this an accurate predictor of how well students in the algebra class will perform on the test? Yes, because Angie is representative of the population in the algebra class Yes, because Angie scored high on the test so it must be easy No, because Angie is not representative of the population in the algebra class No, because Angie scored too high on the test

OpenStudy (anonymous):

It's C. Because she doesn't take Algebra, she takes statistics which is higher math.

OpenStudy (anonymous):

A teacher dropped 8 coins on the table and counted the number of tails to simulate the number of questions a student might guess correctly on a true/false quiz with 8 questions. The dot plot below shows the results of one hundred trials. Based on this data, which number of correct answers is most unlikely?

OpenStudy (anonymous):

That's last question I need some help on

OpenStudy (anonymous):

2 5 6 7

OpenStudy (anonymous):

@OrthodoxMan

OpenStudy (anonymous):

So where is the question?

OpenStudy (anonymous):

The second one

OpenStudy (anonymous):

I believe it's 5 Because it was the coin least likely to get a tail

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