A random sample of 16 policing mobile terminal was selected to estimate the mean battery life of all this type mobile. The sample mean was 1000 hours, with a standard deviation of 100 hours. Assuming that the battery life are approximately normally distribution.What type of distribution of the sample mean is most probably being?
A、Normaldistribution;
B、t-distribution;
C、Fdistribution;
D、binomialdistribution
发布时间：2025-07-23 18:59:39
