SOLUTION: 8 squirrels were found to have an average weight of 10.3 ounces with a sample standard deviation is 0.15. Find the 95% confidence interval of the true mean weight. A. (9.81, 10

Algebra ->  Probability-and-statistics -> SOLUTION: 8 squirrels were found to have an average weight of 10.3 ounces with a sample standard deviation is 0.15. Find the 95% confidence interval of the true mean weight. A. (9.81, 10      Log On


   

Question 1039783: 8 squirrels were found to have an average weight of 10.3 ounces with a sample standard deviation is 0.15. Find the 95% confidence interval of the true mean weight.
A.
(9.81, 10.79)
B.
(10.13, 10.47)
C.
(10.25, 10.35)
D.
(10.16, 10.44)
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The 95% confidence interval itself is+/- t(df=7,0.975)+/-0.15/sqrt(8)
That is +/-2.365/(sqrt)8/0.15=+/-2.365*0.15/sqrt (8)=0.126
That is on either side of the mean of 10.3, so it is (10.174,10.426). This is closest to D.