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A company claims the average response time for their customer support is 10 minutes. You want to test if the actual average response time is

A company claims the average response time for their customer support is 10 minutes. You want to test if the actual average response time is significantly different from this claim. You collect response time data from a random sample of customer support calls, and here are the response times (in minutes) for 12 randomly selected calls: 18 10 10 8 16 16 12 18 18 11 7 21

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