"Six participants called an interactive voice response system to find out the appropriate replacement head for an electric shaver and the nearest location to pick one up. All participants completed the task successfully, with the following task completion times (in minutes): 3.4, 3.5, 1.7, 2.9, 2.5, and 3.2. Do the data support the claim that callers, on average, can complete this task in less than 3minutes?"

I am preparing for my finals in the next month. i can't find the solution to this question is about the interactive voice response system.
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