13. A consumer group wishes to test Apple's claim that the iPad has a 10-hour battery life. After running a random sample of 15 iPads under identical conditions, the group finds a 99% confidence interval for the mean battery life of an iPad to be (8.45, 10.05) hours. Assuming battery life of an iPad is approximately normally distributed, does this confidence interval provide evidence that the iPad does not have an average battery life of 10 hours? (A) No, because the 99% confidence interval contains 10 hours. (B) Yes, because 10 is near the upper endpoint of the confidence interval and the majority of the plausible values for the mean battery life of an iPad are less than 10 hours. (C) Yes, because if a 95% confidence interval for the true mean battery life were constructed it most likely would not contain 10 hours. (D) The sample size is not large enough to make a conclusion about the mean battery life of an iPad.