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This is Statistics.. Provide clean and readable solution. The compressive strength of concrete is being tested by a civil engineer. He tests 12 specimens and

This is Statistics.. Provide clean and readable solution.

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The compressive strength of concrete is being tested by a civil engineer. He tests 12 specimens and obtains the following data. 2216 2237 2249 2204 2225 2310 2281 2263 2318 2255 2275 2295 Construct a 95% upper-confidence bound on the mean strength. [Write your final answer as a decimal number, round it up to 2 decimal places]

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