6. A manufacturer of sprinkler systems used in office buildings to protect against fires claims that its sprinklers are activated at a temperature 0f 130 F. A sample of n = 25 systems when tested, yields a sample average activation temperature of 130.36 F. If activation times are normally distributed with standard deviation= 1.5 F, is there sufficientevidence to contradict the company's claim at level = .05?