Sas Score: 2 of 10 pts 30f 4,0 complete) HWScorec 15%, 6 of 40 p 9.3.17-T S Supp

Question

Sas Score: 2 of 10 pts 30f 4,0 complete) HWScorec 15%, 6 of 40 p 9.3.17-T S Suppose the average sire of a new house builit in a centain county in 2008 was 2,269 square foet. A random sample of 16 new homes buit in this county wos solected deviation of 225 square feet evidence tocoolude that the uverage Uning . 0.10, does this sample provide en house size of a new home in the county has changed since 20087 a. b. Use sechnology to delermine the p-value for this test Delerminé to nul and atemativa hypotheses. Choose to correct onwer bow. HO *2.20, and H, -2269 Ho: 22,299 and H, :

Explanation / Answer

Ans:

a)2 tailed test,so option D is correct.

df=16-1=15

critical t value=tinv(0.1,15)=+/-1.753

b)Test statistic:

t=(2193-2269)/(225/sqrt(16))

t=-1.35

(without rounding off t=-1.35111)

p-value(2 tailed)=tdist(1.35,15,2)=0.197

*(when t value is not rounded off,then p-value=0.1967)

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