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You are testing Ho: = 15 against Ha: > 15 based on a SRS of 25 observations from a Normal population with unknown mean and

You are testing Ho: = 15 against Ha: > 15 based on a SRS of 25 observations from a Normal population with unknown mean and unknown standard deviation. The sample has meanx= 18 and standard deviation s = 5.5.What is the value of the t statistic?

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