JoynerCN

06-17-2010, 11:44 AM

Pardon the double-posting -- I'm not sure what this forum's culture is on creating new threads for new topics, but I tend to try to keep each topic within one question. If I should add on to an open topic in the future, let me know :)

As I mentioned, I'm tutoring a student in Probability/Statistics, and there's also one question on their latest assignment that I consider a little ambiguous:

Basically, given a population mean of 11 and a standard deviation of 3 to describe some set of data, the question is, "What size sample would be required to compute probabilities regarding the sample mean using the normal approximation?"

Considering they haven't yet covered confidence intervals or other things, I'm not sure what sample size might be 'required'. The bigger the better, naturally, but I don't see how there is a minimum threshold in this instance. Any suggestions?

As I mentioned, I'm tutoring a student in Probability/Statistics, and there's also one question on their latest assignment that I consider a little ambiguous:

Basically, given a population mean of 11 and a standard deviation of 3 to describe some set of data, the question is, "What size sample would be required to compute probabilities regarding the sample mean using the normal approximation?"

Considering they haven't yet covered confidence intervals or other things, I'm not sure what sample size might be 'required'. The bigger the better, naturally, but I don't see how there is a minimum threshold in this instance. Any suggestions?