SOLUTION: Dr. Marvin Mindfog is worried about the intellectual abilities of his newly arrived white rats. They seem to lie around their cages doing nothing but listlessly squeaking to themse

Algebra ->  Probability-and-statistics -> SOLUTION: Dr. Marvin Mindfog is worried about the intellectual abilities of his newly arrived white rats. They seem to lie around their cages doing nothing but listlessly squeaking to themse      Log On


   

Question 1186237: Dr. Marvin Mindfog is worried about the intellectual abilities of his newly arrived white rats. They seem to lie around their cages doing nothing but listlessly squeaking to themselves. He suspects that the new rats are not as smart as the average rat. He knows that it takes the average rat 8 trials to master the Mindfog Mammal Maze. He randomly selects 24 rats from the most recent shipment and trains them in the mammal maze. The mean number of trials it took the 20 rats to master the maze was 9 with s = 2. construct a 95% CI around your sample mean.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
95% half t-interval for df=19 is 2.093* s/sqrt(n)=2.093*2/sqrt(20)=0.9360
the interval is (8.06, 9.94) units trials