User:Leolsz/Alternative hypothesis/Hanshenli Peer Review

General info

 * Whose work are you reviewing?

Leoisz


 * Link to draft you're reviewing
 * Independent and identically distributed random variables


 * Link to the current version of the article (if it exists)

Evaluate the drafted changes
(Compose a detailed peer review here, considering each of the key aspects listed above if it is relevant. Consider the guiding questions, and check out the examples of what feedback looks like.)

1.   Introduction

The introduction is not enough right now, for example, it can be added some content about the relationship between null hypothesis and alternative hypothesis. or add some example or metaphor, for example the null hypothesis is defendant in the jury who is innocent until guilty and the alternative hypothesis is charges against defendant. By using this metaphor, it is more easily to understand the concept. What's more the relationship in the introduction and the rest of this article is small. So there are still some room to improve the introduction.

2.   Example

The specific example alternative hypothesis should be discussed in hypothesis testing and talk about when to choose the alternative hypothesis, and the criteria for us to follow when we give up the null hypothesis and choose alternative hypothesis.

3. My suggestion on how to improve

1)add something about the relationship between the null hypothesis and alternative hypothesis

The null hypothesis is an event that we expect in an experiment, while the alternative hypothesis is an event that is difficult (or almost impossible) to occur in an experiment. Therefore, when performing a test, we always take the null hypothesis as the opposite of the expected result, that is, put the proposition that you want to prove on the alternative hypothesis.

2) some explanation about type one error and type two error

A statistical test procedure is comparable to a criminal trial, a defendant is considered not guilty as long as his or her guilt is not proven. The prosecutor tries to prove the guilt of the defendant.

Type one error is convicting a innocent defendant, type two error is acquitting a criminal.