表被动
发表于 2025-3-25 06:54:07
http://reply.papertrans.cn/19/1812/181160/181160_21.png
dry-eye
发表于 2025-3-25 07:43:09
Elementary Sampling Theoryto be carried out on a sample only. From the sample, estimates of population parameters, such as µ and σ, for each of the several variables being measured are derived. Clearly, the amount of credence that can be placed in the estimates will depend on factors such as the degree to which the sample is
Obedient
发表于 2025-3-25 15:33:47
http://reply.papertrans.cn/19/1812/181160/181160_23.png
爱哭
发表于 2025-3-25 16:54:09
http://reply.papertrans.cn/19/1812/181160/181160_24.png
密码
发表于 2025-3-25 20:03:41
Recording Data on Punch Cardsf the subjects are interviewed individually-the interviewer may record the answers for them. To facilitate the analysis of the data it is important that the questionnaires be drawn up with care. This is especially so when it is intended to transfer the data on to punch cards for mechanical sorting o
成份
发表于 2025-3-26 00:44:33
http://image.papertrans.cn/b/image/181160.jpg
harmony
发表于 2025-3-26 04:42:53
Information Systems and TechnologiesIt has been noted that one of the purposes of statistics is to indicate how results obtained from an experiment or investigation may be described in a concise way. Some common descriptive measures will now be introduced.
乐章
发表于 2025-3-26 12:19:13
https://doi.org/10.1007/978-3-031-45642-8Statistical theory borrows heavily from the theory of mathematical probability and in this chapter some elementary concepts from the latter will be introduced.
Ligneous
发表于 2025-3-26 12:41:34
Murilo M. Breve,Carlos Balsa,José RufinoIn many observational studies the investigator is concerned not with continuous variables but with categories into one or other of which the individuals in his sample can be placed. Marital status is an example, and the categories involved might be somewhat as follows:
法官
发表于 2025-3-26 17:17:02
Nguyen Minh Hai,Tran Van Lang,Thanh The VanThe methods of analysis of variance are now so widely used in experimental work that some knowledge of them is desirable. An introduction to them is given in this chapter.