
从均值为μ,方差为σ2(有限)的任意一个总体中抽取样本容量为n的样本,则( )。
A . 当n充分大时,样本的均值的分布近似服从正态分布B . 只有当n<30时,样本均值的分布近似服从正态分布C . 样本均值的分布与n无关D . 无论n多大,样本均值的分布都为非正态分布


从均值为μ,方差为σ2(有限)的任意一个总体中抽取样本容量为n的样本,则( )。
A . 当n充分大时,样本的均值的分布近似服从正态分布B . 只有当n<30时,样本均值的分布近似服从正态分布C . 样本均值的分布与n无关D . 无论n多大,样本均值的分布都为非正态分布
从均值为μ,方差为σ2(有限)的”相关的问题
Fill in the blanks by selecting suitable words from the word bank. You may not use any of the words more than once.
在空格处填入选项的字母
A gained B derive C mentioned D stumped E surpassed F heavily G retorted H artistic
I determine J distorted K analytical L identically M opposite N luminous O responsible
Have you ever heard people say that they tend to be more of a right-brain or left-brain thinker? From books to television programs, you have probably heard the term 1._______ numerous times, or perhaps you have even taken an online test to 2. _______ which type best describes you.
Do different parts of the brain really control different bodily and mental functions? Over the years, a theory that has 3. _______ in popularity is that the right brain and the left brain are 4_______ for different modes of thought and that the way in which a person thinks will depend on which side of his brain works more actively.
People who rely more 5. _______ on the right half of their brain tend to be more imaginative and spontaneous. They are interested in patterns, shapes and sizes, for the right brain is associated with 6. _______ ability like singing, painting, writing poetry, etc. Left-brain dominated people are quite 7._______ in the way they think. They tend to be more logical and 8._______ in their thinking and usually stand out in mathematics and word skills.
While the different functions of the two brain parts may have been 9._______ and exaggerated by popular psychology, understanding your strengths and weaknesses in certain areas can help you develop better ways to learn and study. For example, if you are usually 10._______ in trying to follow verbal instructions, an activity often cited as a right-brain characteristic, you can benefit from writing down directions and developing better organizational skills.