问题
问答题 简答题
怎样确定假设检验问题的零假设和备择假设？
答案
参考答案：
通常零假设表示结果的差异是随机因素引起，而不是系统性或结构性因素引起；备择假设是研究者要证明的假设，要认为其正确必须有显著证据才能被人接受；零假设是受到保护的假设。
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怎样确定假设检验问题的零假设和备择假设？
参考答案：
通常零假设表示结果的差异是随机因素引起，而不是系统性或结构性因素引起；备择假设是研究者要证明的假设，要认为其正确必须有显著证据才能被人接受；零假设是受到保护的假设。
In China, more and more middle school students are getting sleeping time than before.Most students sleep less than 8 hours every night they have too much homework to do. Some homework is given by their teachers. And some by their .Also , some students don’t know how to save time, they are not enough while they do their homework., so they make many mistakes, and it takes them a lot of time. Some students_ too much time watching TV programs or playing computer games. They very late. Some students have to get up early every morning on weekdays to get to school on time bus or bike. It can be a time from home to school. School and parents should cut down some of the so that the children can enjoy more than 8 hours of sleep every night for their health. As we all know ,children are our country’s .They should be well cared for.
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