Posted by Aboli on .
a manufacturer claims that the life time of a certain brand of batteries has a varaince of 5000(hours)^2. a sample of 26 has a variance of 7200(hours)^2. assuming that it is reasonable to treat these data as a random sample from a normal population, test the manufacturer's claim at alpha=0.02 level.
plz plz help me...!!!
stats of biologists -
Look below at related questions