The maker of a certain brand of car mufflers claim that the life of the mufflers has a variance of .8 year. A random sample of 16 of these mufflers showed a variance a 1 year. Using a 5% level of significance, text whether the variance of all the mufflers of this manufacture exceeds .8 year. |

Last modified: Wed May 13 12:29:11 EDT 1998