A normal population has a mean of 0.1 and standard deviation of 2.1. Find the probability that mean of a sample of size 900 will be negative.
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The standard error of the mean (SE) is equal to the standard deviation divided by the square root of the sample size. In this case, the standard deviation is 2-1 and the sample size is 900. So, the standard error of the mean is: SE = (2-1) / √900 = 1 / √900 = 1 / Show more…
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