Question: Suppose we are about to draw a simple random sample of 25 observations from a normally distributed population where s i g m a =

Suppose we are about to draw a simple random sample of 25 observations from a normally distributed population where sigma = 8 and mu =50

Which of the following statements are true? There maybe more than one correct statement ; Check all that are true

  1. The sampling distribution of the sample mean has a mean of 50.
  2. The standard deviation of the sampling distribution of the sample mean is 1.2
  3. -x (x bar) is normally distributed.
  4. The sample mean will not be normally distributed since n<30.

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