Understanding the types of a hypothesis test.

A Hot Fudge Sundae has on average 12 ounces of ice cream. If I were to set up a hypothesis test to test the ability of a new employee making the hot fudge sundae with an average of 12 ounces of ice cream, would the hypothesis test be a "one tailed" or a "two tailed" test? Briefly Explain.

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... be practical in this case because the aim is not to test whether employee could make on average MORE than 12 ounces. Nor is it to test in the other direction whether the employee would make on ...