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【简答题】
The manager of an insurance company’s 24 hours emergency help line wishes to understand whether responsiveness to customer calls varies according to the time of day. The manager takes a random sample of 90 customer calls, and for each call determines the work shift during which the call was made, and whether the call was answered within 10 seconds. The data appears in the table below. Being careful to state your conclusions, and using a level of significance of α = 5%, test whether responsiveness is independent of work shift. [12 marks] Using this question to provide examples, explain the difference between a type 1 and type 2 error. [3marks]
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A.
正确
B.
错误
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【多选题】电竞运动员的职业黄金年龄是18-27岁,大多数青少年有一种强烈的成人感,进而产生了强烈的独立意识。心其理发展的矛盾性及表现有()。
A.
反抗性与依赖性并存
B.
闭锁性与开放性并存
C.
勇敢与怯懦并存
D.
高傲与自卑并存
E.
唯心主义与唯物主义并存
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A.
正确
B.
错误
【多选题】青少年心理发展的动荡性主要表现在( )。
A.
对未来发展的认知与现实社会认知脱节
B.
独立与依赖的矛盾
C.
性意识增强与道德要求的矛盾
D.
学习文化知识的繁重负担与文娱爱好空间的矛盾
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