【判断题】【消耗次数：1】
不同项目的风险大小使用标准差进行对比就行，标准差越大风险越大。
①
正确
②
错误
参考答案：
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相关题目
【简答题】
什么是标准差系数？标准差系数在什么条件下使用？
【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
随机题目
【单选题】
Jean Wagner’s most enduring contribution to the
study of Afro-American poetry is his insistence that
it ____ in a religious, as well as worldly, frame
of reference.
①
is to be analysed
②
has been analysed
③
be analysed
④
should have been analysed
【单选题】
We feel it is high time that the Government ____
something to check the inflation.
①
did
②
do
③
should do
④
would do
【单选题】
She was teaching me ____ you would teach a younger child to speak the language.
①
the way
②
in the way
③
a way
④
to the way
【单选题】
You should have put the milk into the icebox, I expect it ____ undrinkable.
①
became
②
had become
③
has become
④
becomes
【单选题】
The students expected there ____ more reviewing classes before the final exams.
①
is
②
being
③
have been
④
to be
【单选题】
You should have your eyes tested every year in case the ____of your spectacles need changing.
①
lenses
②
glasses
③
sights
④
crystals
【单选题】
As the train will not leave until one hour later, we
____ grab a bite at the snack bar.
①
may well
②
just as well
③
might as well
④
as well
【单选题】
____ money, she is quite rich. However, this does not mean that she is happy.
①
Concerning
②
As to
③
In terms of
④
In the light of
【单选题】
She always put her medication on the top of the
shelf lest the children ____ it by mistake.
①
took
②
should take
③
had taken
④
would take
【单选题】
Evidence came up ____ specific sounds are recognized by babies as young as six months old.
①
what
②
that
③
which
④
whose