b:head_first_statistics:using_statistical_sampling
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b:head_first_statistics:using_statistical_sampling [2019/11/21 08:45] – [Sometimes samples can be biased] hkimscil | b:head_first_statistics:using_statistical_sampling [2024/10/30 11:52] (current) – hkimscil | ||
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====== Using Statistical Sampling ====== | ====== Using Statistical Sampling ====== | ||
- | {{tablelayout? | + | < |
+ | rnorm(16, 110, 10) | ||
+ | </ | ||
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A statistical **population** refers to the entire group of things that you're trying to measure, study, or analyze. It can refer to anything from humans to scores to gumballs. The key thing is that a population refers to all of them. A **census** is a study or survey involving the entire population, so in the case of Mighty Gumball, they’re conducting a census of their gumball population by tasting every single one of them. A census can provide you with accurate information about your population, but it’s not always practical. When populations are large or infinite, it's just not possible to include every member. | A statistical **population** refers to the entire group of things that you're trying to measure, study, or analyze. It can refer to anything from humans to scores to gumballs. The key thing is that a population refers to all of them. A **census** is a study or survey involving the entire population, so in the case of Mighty Gumball, they’re conducting a census of their gumball population by tasting every single one of them. A census can provide you with accurate information about your population, but it’s not always practical. When populations are large or infinite, it's just not possible to include every member. | ||
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* [[: | * [[: | ||
* [[:Unit of analysis]] 참조 | * [[:Unit of analysis]] 참조 | ||
- | Define your [[:sampling# | + | Define your [[:Sampling# |
If you don’t design your sample well, your sample may not be accurate. | If you don’t design your sample well, your sample may not be accurate. | ||
See [[: | See [[: | ||
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{{: | {{: | ||
- | < | + | < |
- | < | + | __Poorly designed questions__ |
- | #. 최근 ‘고위공직자범죄수사처’ 즉 공수처 법안 제정을 놓고 검찰개혁의 핵심이라는 입장과 대통령 권력 강화책에 불과하다는 입장이 맞서고 있습니다. 선생님께서는 공수처를 설치하는 데 대해 어떻게 생각하십니까? | + | |
- | + | ||
- | #. 선생님께서는 대통령, 국회의원, | + | |
- | [출처: 중앙일보] 수상한 여론조사···응답자 절반이 文투표층이었다 | + | * Leading question: How great is our hard-working customer service team? |
- | </ | + | * Fixed: How would you describe your experience with the customer service team? |
- | </ | + | |
- | <WRAP alert 60%> | + | * 유도질문: 매년마다 베스트 |
- | < | + | * 정상질문: |
- | 12일 조사에서는 “최근 이미선 후보자에 대한 국회 인사청문회가 열렸습니다. 선생님께서는 | + | |
- | 그러나 17일 조사에서는 “여야 | + | * 단정질문: 평상시 맥주를 어디에서 |
+ | * 맥주를 먹는다는 | ||
- | 2차 조사의 질문은 불필요하게 | + | * 이중장전질문: 저희가게에서 |
- | </ | + | |
- | </ | + | |
+ | * Double Negative: 사용하신 물건이 깨끗하지 않지 않았나요? | ||
+ | * 나는 온라인으로는 드물게 물건을 안산다. | ||
+ | </ | ||
===== How to choose your sample(, then) ===== | ===== How to choose your sample(, then) ===== | ||
- | [[:Sampling#simple random sampling]] | + | see [[: |
b/head_first_statistics/using_statistical_sampling.1574293509.txt.gz · Last modified: 2019/11/21 08:45 by hkimscil