For sampling flaw type, when we say the sample is large enough, what is the amount in usual?
For instance, for 100 sample, it's enough.
What about 50? Is there a specific amount that we consider to be enough for the survey to be not biased?
I tried to use the strategy of flagging questions that I am not 100% sure, but I couldn't find the flag button for the 7sage practice tests. Could someone please help an apparently blind man?
It seems like I am incapable at doing the strengthening and weakening questions. I read the answer choices and just think that none of them make sense. I could use some advice.