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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...


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(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    =??       

 

(d) Find the p-value. (Round your answer to 4 decimal place.)

 

p-value    =??       

 

(e) State your conclusion.

 

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

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