SOLUTION: random sample of 12 size AA batteries for toys yield a mean of 3.85 hours with standard deviation, 1.15 hours. (a) Find the critical value, t*, for a 99% CI. t* = (b) Find th

Algebra ->  Probability-and-statistics -> SOLUTION: random sample of 12 size AA batteries for toys yield a mean of 3.85 hours with standard deviation, 1.15 hours. (a) Find the critical value, t*, for a 99% CI. t* = (b) Find th      Log On


   

Question 1140021: random sample of 12 size AA batteries for toys yield a mean of 3.85 hours with standard deviation, 1.15 hours.
(a) Find the critical value, t*, for a 99% CI. t* =
(b) Find the margin of error for a 99% CI.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
t (df=11,0.995)=3.106
half-interval is margin of error
t*s/sqrt(n)=3.106*1.15/sqrt(12)=1.03