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Adam tabulated the values for the average speeds on each day of his...

Adam tabulated the values for the average speeds on each day of his road trip as 60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4 mph. The sample standard deviation is 7.309.

Adam reads that the average speed that cars drive on the highway is 65 mph.


The t-test statistic for a two-sided test would be __________. Answer choices are rounded to the hundredths place.

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