Question 1195911
Ho: mean is 15
Ha: mean is not 15
alpha=0.10 p{reject Ho|Ho true}
test statistic is a t (0.95; df=9) critical value is |t| >1.833
mean is 17.7 and s=9.08
t=(17.7-15)/9.08/sqrt(10)
=0.94
fail to reject the Ho; insufficient evidence to say that there is a difference at the 10% level. p-value=0.37
confidence interval will contain 15; it is 17.7+/-2.262*9.08/sqrt(10); the latter=6.50
The 95% confidence interval is 17.7+/- 6.50 or (11.20, 24.20) units pictures.