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A random sample of 25 managers in a city was asked how long their assistants usually spent at morning tea. The sample times had a

A random sample of 25 managers in a city was asked how long their assistants usually spent at morning tea. The sample times had a mean of 22 minutes with a standard deviation of 5 minutes. Suppose it is claimed that assistants to managers take 25 minutes on average for morning tea. Is this claim likely to be correct? Test atD= 0.01.

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