Two microprocessors are compared on a sample of 6 benchmark codes to determine whether there is a difference in speed the times (in seconds) used by each processor on each code are as follows: processor a: 27.8, 17.3, 23.8, 15.0, 27.4, 23.4. Processor b: 25.8, 17.6, 23.5, 14.2, 26.8, 21.5. Find a 90% confidence interval for the difference between the mean speeds. Let d represent the speed of the processor A minus the speed of processor B. Use the ti 84 calculator. Round the answers to two decimal places. A 90% confidence interval for the difference between the mean speeds is

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