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# (a) Choose the appropriate hypotheses to see whether the number of graffiti incidents declined. Assume d is the mean difference in graffiti incidents...

(a) Choose the appropriate hypotheses to see whether the number of graffiti incidents declined. Assume μd is the mean difference in graffiti incidents before and after.

a. H1μd ≤ 0 versus H0μd > 0.

b. H0μd ≥ 0 versus H1μd < 0.

(b) Find the test statistic tcalc(A negative amount should be indicated by a minus sign. Round your answer to 2 decimal place.)

tcalc       =jQuery20003801681964427792_1525995999098 ?

(c) State the critical value tcrit for α = .05. (A negative amount should be indicated by a minus sign. Round your answer to 3 decimal place.)

tcrit    =??

p-value    =??

We (cannot/can) conclude that the number of graffiti incidents has decreased.?

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