If a certain sample of data has a mean of 20.0 and astandard deviation of 3.0, which of the following values is more than 2.5 standard deviations from the mean?
12.0
13.5
17.0
23.5
26.5
登录 或 注册 后可以参加讨论
差 2.5个 标准差,差 2.5个 3.0. 正着差和反着差。
差 2.5个 标准差,差 2.5个 3.0.
正着差和反着差。
登录 或 注册 后可以参加讨论