【单选题】【消耗次数：1】
抽样误差是指：
①
不同样本指标之间的差别
②
样本指标与总体指标之间由于抽样产生的差别（参数与统计量之间由于抽样而产生的差别）
③
由于抽样产生的观测值之间的差别
④
样本中每个个体之间的差别
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
When he came back after an absence of 20 years, he found his hometown completely ____. ?
①
changing ?
②
to be changed ?
③
to change ?
④
changed ?
【单选题】
We have studied English for only one year, ____ we can perform English short play already.?
①
for ?
②
and ?
③
yet ?
④
or?
【单选题】
With the old man ____ the way, we had no trouble in finding that mysterious cave.
①
leading
②
led
③
lead
④
to be led
【单选题】
How can he ____if he is not ____?
①
listen--hearing
②
hear--listening
③
be listening--heard
④
be hearing--listened to
【单选题】
Lily: Hello, John! What was the weather like yesterday?John: ____
①
I like nice and bright weather.
②
You don’t like cold weather, do you?
③
That was a favorable weather.
④
Nice and bright, not too cold.
【单选题】
10. Far away around the corner I could see a small female ____advancing towards us.
①
body
②
figure
③
man
④
symbol
【单选题】
It is often more difficult to find trained men than ____ for scientific research.
①
getting financial support
②
to getting financial support
③
to get financial support
④
in getting financial support
【单选题】
“Here is the money I promised,” he said. “I always ____ promises.”
①
agree
②
follow
③
make
④
keep
【单选题】
This advertisement is a ____ example of their marketing plan.
①
social
②
typical
③
natural
④
historical
【单选题】
The earth ____ heat and light from the sun.
①
takes on
②
takes in
③
absorbs in
④
picks out