Mean and standard deviation of sampling distribution
A population has a mean of 81 and standard deviation of 25. Find the mean and standard deviation of sampling distribution of a sample means with sample size 262.
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A body weighs 6 grams when placed on one pan and 24 grams when placed on the other pan of a defective beam balance according to the reading shown on the instrument. If the beam is horizontal when both pans are empty, what is the true weight of the
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