lanxicy.com

第一范文网 文档专家

第一范文网 文档专家

Sources of Errors in Survey

1. I wouldn’t anticipate that the proportion of “yes” responses in the same for the two group. Because the survey starts from the random samples of adult Americans, the answer couldn’t be the same, everybody has different options, then the answer wouldn’t be quiet the same. 2. I would expect the proportion declaring agreement with the policy might differ between the two groups. Because for each group there has same number of student, and one for smoking students, another one for non-smoking students. Then for this question, the answer should be totally different. 3. I wouldn’t expect the proportion of: yes” responses to be close to the actual proportion of married people in the community who have engaged in extramarital sex. Becausefor the face- to- face interview people sometimes don’t tell the truth. Then at the end the actual proportion cannot be close to the “yes” responses. 4. I wouldn’t be surprised if the proportions of people expressing approval differed between these two groups. Because is the random samples of Americans, the answers are different shows that everyone has he/she own option. And as what I thought that the answers are not different, then that will be the problem.

Bias

1. Surveys were mailed to 19,000 California doctors, but just 2000 completed surveys were returned. The first paragraph said “more than half of CA doctors……” that’s not true. The reason why they didn’t get enough people to get the responds, that’s because they were mailing survey. This is Non- Responds Bias. 2. Yes, there are some individuals in the population will not have chance of being included in the sample. Just think about how many teenagers out there in the society are not in school. So this is the Undercoverage Bias. 3. This is Undercoverage Bias, because the survey is through the internet, but back to that time period, not everyone uses internet, just upper-income, highly educated, white and urban to produce result. But those cannot represent whole country nations. I think today, if we do internet polling is much more accurate than 19990s. 4. This is Non-Responds Bias, this will influence the result for this study, because not everyone responds to this question, and I think for some people who do gambling, they probably will lie or just not to reply the mail. So the answer well could be not accurate.

相关文章:

- HW独立学院教师绩效评价体系研究
- objectives consistency and evaluation, a performance evaluation system for
*HW*independent institute teachers has been constructed on the basis of*statistic*data...

- 华为常见基础问题
- [Quidway-behavior-test] quitS2300&S3300&S5300 V100R005 以后版本 [Quidway] traffic behavior test [Quidway-behavior-test]
*statistic*enable [Quidway-behavior...

- 如何进行Dying Gasp测试——ForBaidu
- 1)
*HW*5600 局端 在局端使用统计端口命令(不需要立即查询)查询 LOP 信息: display*statistic*performance portID 查看 ATU-R 端(即 Modem 端)的 LOP,如果 LOP...

- 多元统计分析hw01
- 多元统计分析
*hw*01_管理学_高等教育_教育专区。多元统计分析上机作业多元...正态性检验: 正态性检验: Tests of Normality Kolmogorov-Smirnov*Statistic*df...

- NodeB CDT跟踪指导
- 修改跟踪配置文件 对应版本安装目录下(以版本 V200R010C01B051 为例)\
*HW*LMT...(DL)Dldsp Data Flow*Statistic*(period:s) 2,3500,1,65535,1,255,2,,,2...

- hw3 -solution
*hw*3 -solution_信息与通信_工程科技_专业资料。Assignment #3 1. Use the data...Durbin-Watson*statistic*= 1.10721 < 1.6 (when DW > 2.4 or DW < 1.6,...

- 武汉理工大学现代交换技术复习资料
- 异步时分多路复用技术,也叫做统计时分多路复用技术(STDM,
*Statistic*Time-Division...以后*HW*2 上每一帧的 TS22 时隙输入的话音信息都写入 SMA2 的 22 号单元,...

- awl词汇
- 尽管如此, 然而 * whereby [
*hw*???bai] adv.靠那个; 凭那个; 借以 * ...评价, 估计, 估价 **statistic*[st??tistik] adj.统计的,统计学的 n.统计...

- IPSec配置案例
*statistic*system enable # ike proposal 10 # ike peer a pre-shared-key ...*hw*cc undo nat alg enable ils undo nat alg enable pptp undo nat alg ...

- USG50典型应用之PPPoE&L2TP&IPSec-20080311-C
*hw*cc undo nat alg enable ils undo nat alg enable pptp undo nat alg ...*statistic*system enable # ike peer a pre-shared-key 123456 remote-address ...

更多相关标签: