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A random sample of 19 subjects was asked to perform a given task The time...

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A random sample of 19 subjects was asked to perform a given task The time in seconds it took each of them to complete the task is recorded below 25 25 39 34 35 39 40 32 28 35 29 44 26 47 38 39 31 45 37 Send data to calculator Send data to Excel If we assume that the completion times are normally distributed find a 90 confidence interval for the true mean completion time for this task Give the lower limit and upper limit of the 90 confidence interval Carry your intermediate computations to at least three decimal places Round your answers to one decimal place If necessary consult a list of formulas Lower limit Upper limit X

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