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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.
  • exceed .8 year
  • either a or b
  • a and b
  • It can not be solved
  • does not exceed .8 year
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    Carlos Rodriguez <carlos@math.albany.edu>
    This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
    Last modified: Wed May 13 12:29:11 EDT 1998