Question 1187774
Ho: mean is 15000
Ha; mean is not 
alpha=0.05 p{reject Ho|Ho true}
Test stat is a t0.975, df=11)
critical value |t| > 2.201
calculation mean is $14347.17; s=$2048.54
t=(14347.17-15000)/2048.54/sqrt (12)
=-652.83*sqrt(12)/2048.54
=-1.10
fail to reject Ho; insufficient evidence to suggest the true mean is not $15,000.
p-value=0.29