Which of the following statements are true? I. The sampling distribution of ¤ has standard deviation even if the population is not normally distributed. II. The sampling distribution of æ is normal if the population has a normal distribution. III. When n is large, the sampling distribution of is approximately normal even if the the population is not normally distributed. OI and II I and II O Il and III O1, II, and II None of the above gives the complete set of true responses.

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A: I solved exactly first question because of bartleby policy if you want more please upload separately

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A: As per company guidelines I solved exactly three subparts of the question.

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Q: In a health examination survey of a prefecture in Japan, the population was found to have an average…

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Q: need the

A: