4. A manufacturer claims that the mean lifetime of its lithium batteries is 1100 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1080 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.01. A. Reject the H0; there is not enough evidence to support the claim.

B. Do not reject the H0; there is enough evidence to support the claim.