A random sample is selected from a population with mean -99 and standard deviati

Question

A random sample is selected from a population with mean -99 and standard deviation -10 For which of the sample sizes would it be reasonable to think that the r sampling distribution is approximately normal in shape? (Select all that apply) 100 n-400 You may need to use the appropriate table in Appendix A to answer this question. Need Help? My Notes Your Teaches Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5. (a) What are the mean and standard deviation of the sampling distribution?

Explanation / Answer

from central limit theorum for unknown distribution sample size should be greater then 30 for distribution of sampling means to be norma;

hence correct sample size are 45,50,100,400

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