Mathematics, 24.03.2020 03:05, Amyra2003

The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and finds that the sample mean is 3259.9 psi and the sample standard deviation is 35.57 psi. Compressive strength is known to be normally distributed.

Find a 95% confidence interval for mean compressive strength.

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The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and...