The distribution of actual weights of 8‑ounce wedges of cheddar cheese produced at a dairy is Normal, with mean 8.1 ounces and standard deviation 0.2 ounces. A sample of 10 of these cheese wedges is selected. What is the standard deviation of the sampling distribution of the mean?

Which one ? is the answer and how to find this answer

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When you divide a fraction less than 1 by a whole number greater than 1 is the quotient less than,greater than, or equal to the dividend?