An accounting firm is testing a new software program. The company selects a random sample of workers and trains them on the new software until the employees are equally comfort able with the two programs. These workers are then asked to complete a set of tasks-with the old software and the new software (order of software randomly assigned)-and keep track of how long (in minutes) the work takes. A 95% confidence interval of the average difference in time is (3.9, 14.3). The order of subtraction was (time with old software - time with new software).Without doing any further calculations, what can you conclude about whether the tasks are completed in the same amount of time with the two software programs? What level of significance applies? Which software program would you recommend? Explain your reasoning.
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