You collect a sample of twenty pairs of yearly sales in 2000 and 2005. You hypothesize that yearly sales have decreased between 2000 and 2005. If _D = -99.6 and s_D = 160.60, what is the critical value of t if $\alpha$ = .05? A) -1.729 B) -2.093 C) 1.725 D) 1.086

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The critical value of t for a two-tailed test with a significance level of 0.05 and 19 degrees of freedom is -1.729.

You Collect a Sample of Twenty Pairs of Yearly Sales α\alphaα

You Collect a Sample of Twenty Pairs of Yearly Sales $\alpha$