【判断题】【消耗次数：1】
标准差越大，观察个体之间变异越小。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
下列有关标准差的说法中错误的是（）。
①
样本标准差用S表示
②
标准差越大，数据的集中趋势越小
③
方差的算术平方根称为标准差
④
标准差的量纲与原变量一致
⑤
标准差越大，数据的离散趋势越大
【简答题】
估计标准差，离差值越小，反映观察点越靠近回归直线，即回归直线的代表性[填空1]。
【简答题】
什么是标准差系数？标准差系数在什么条件下使用？
随机题目
【单选题】
____ what the situation would be like, they decided to keep silent.
①
Knowing not
②
Not know
③
Not knowing
④
Having not known
【单选题】
All of us think it difficult to ____ the difference between the two things.
①
talk
②
speak
③
lecture
④
tell
【单选题】
Alicereceived an invitation from her boss, ____came as a surprise.?
①
it ?
②
that ?
③
which ?
④
he?
【单选题】
____ is essential to a successful scientist; he cannot hope to make any progress if he cannot work in a controlled way.
①
Discipline
②
Decision
③
Declaration
④
Dependence
【单选题】
The airport is five miles ____ my house.
①
away from
②
far from
③
far away from
④
far from away
【单选题】
Many a customer____ about the poor quality of the washing machine.
①
complains
②
complain
③
are complaining
④
have complained
【单选题】
____ by this, he couldn’t say anything.
①
Satisfied
②
Feared
③
Frightened
④
Encouraged
【单选题】
George is so ____ in debt that he is afraid to show up in the pub in case he meets his six creditors.
①
involved
②
concentrated
③
devoted
④
concerned