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Question description

A personnel director in a particular state claims that the mean annual income is greater in one of the state’s  (country A), a random sample of 14 residents has a mean annual income of \$40,200 and a standard deviation of \$8100.  In country B, a random sample of 13 residents has a mean annual income of \$38,400 and a standard deviation of \$5700. At a=0.05,.

Find the standardized test statistic__________

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