A company claims that its batteries last an average of 100 hours under normal use. There have been several complaints that the batteries don't last that long, so an independent testing agency is engaged to test them. The population standard deviation is known to be 10 hours. For the 25 batteries they tested, the mean lifetime was 96 hours.

If the true population mean is 100 hours, you have made a

Type I ErrorType II errorCorrect decision

If the level of significance had been .01, would your answer to part b change?YesNo