We are performing a two-sample test about means: H_(0): mu _(1)= mu _(2) versus H_(a): mu _(1)

Question

We are performing a two-sample test about means:

H_(0):\mu _(1)=\mu _(2)

versus

H_(a):\mu _(1)<\mu _(2)

. The first sample info: the sample size is 8 , the sample mean is 17.250 , and the sample standard deviation is 2.605 . The second sample info: the sample size is 8 , the sample mean is 19.120 , and the sample standard deviation is 3.000 . What is the value of test statistic?

-1.520

1.520

-1.331

-2.234

1.331

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