A sample of 54 research cotton samples resulted in a sample average percentage elongation of 8.14 and a sample standard deviation of 1.47. Calculate a 95% large-sample CI for the true average percentage elongation u. (Round your answers to three decimal places.) What assumptions are you making about the distribution of percentage elongation? O We assume the distribution of percentage elongation is normal with the value of a unknown. We assume the distribution of percentage elongation is normal with the value of a known. We assume the distribution of percentage elongation is uniform. We make no assumptions about the distribution of percentage elongation.

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