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Independent random samples selected from two normal populations produced the sample means and standard deviations shown below: Sample 1 Sample 2 X1 = 5.4 X?

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Independent random samples selected from two normal populations produced the sample means and standard deviations shown below: Sample 1 Sample 2 X1 = 5.4 X? = 8.2 01 = 3.46 02 = 5.2 n1 = 20 n2 = 18 Conduct the test Hol/1 - /2 =0 against H1:/1 - /2 #0, then the test statistic is O 1.93 O -1.93 O 2.22 O -4.12

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