单项选择题
A.nonparametric statistics
B.nominal data
C.descriptive statistics
D.inferential statistics
判断题 Statistical independence means the outcome of one event is independent of the outcome of a second event.
判断题 If the population distribution is unknown, in most cases the sampling distribution of the mean can be approximated by the normal distribution if the sample size is at least 15 observations.
判断题 When analyzing categorical data, stem and leaf display is an appropriate plot.