Sammy wants to know who likes to play sports. So she had two groups of people. The first group was 85 students randomly selected and the other 15 were teammates for the school basketball team. Which one(s) or neither of them, represent the school population?

Question

calculusxy · Answer

@goformit100

calculusxy · Answer

@wio

calculusxy · Answer

Would it be the one that was randomly selected?

ganeshie8 · Answer

Yep!

calculusxy · Answer

Why is that?

ganeshie8 · Answer

15 basket ball players group is biased as they are in a sport already - So this group does not represent the bulk of school population

ganeshie8 · Answer

random sampling assures that you get a sample that represents the population so that you can generalize your findings to the overall population

ganeshie8 · Answer

random sampling => you can generalize

calculusxy · Answer

@ganeshie8 Can you explain this one thing for me? What does "symmetrical graph" mean?

calculusxy · Answer

They said that it had to do something with the same points above and below the middle points. I couldn't really quite get that.

ganeshie8 · Answer

the graph looks same if you fold it at the center mean value
for example : normal distribution

ganeshie8 · Answer

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