ACCA P3考试必考知识点:Linear regression
为帮助大家更好复习ACCA考试,今天yjbys小编为大家带来ACCA P3考试Linear regression里面的知识点,由于全都是英文,大家不认识的可以去查阅相关字典工具,方便理解!
Least squares linear regression is a method of fitting a straight line to a set of points on a graph. Typical pairs of graph axes could include:
• total cost v volume produced
• quantity sold v selling price
• quantity sold v advertising spend.
The general formula for a straight line is y = ax +b. So, ‘y’ could be total cost and ‘x’ could be volume. ‘a’ gives the slope or gradient of the line (eg how much the cost increases for each additional unit), and ‘b’ is the intersection of the line on the y axis (the cost that would be incurred even if production were zero).
You must be aware of the following when using linear regression:
• The technique guarantees to give the best straight line possible for any set of points. You could supply a set of people’s ages and their telephone numbers and it would purport to a straight-line relationship between these. It is, therefore, essential to investigate how good the relationship is before relying on it. See later when the coefficients of correlation and determination are discussed.
• The more points used, the more reliable the results. It is easy to draw a straight line through two points, but if you can draw a straight line through 10 points you might be on to something.
• A good association between two variables does not prove cause and effect. The association could be accidental or could depend on a third variable. For example, if we saw a share price rise as a company’s profits increase we cannot, on that evidence alone, conclude that an increase in profits causes an increase in share price. For example, both might increase together in periods of economic optimism.
• Extrapolation is much less reliable than interpolation. Interpolation is filling the gaps within the area we have investigated. So, if we know the cost when we make 10,000 units and the cost when we make 12,000 units, we can probably make a reasonable estimate of the costs when we make 11,000 units. Extrapolation, on the other hand, is where you use data to predict what will occur in areas outside the region you have investigated.
We have no experimental data for those areas and therefore run the risk that things might change there. For example, if we have never had production of more than 12,000 units, how reliable will estimates of costs be when output is 15,000 units? Overtime might have to be paid, machines might break down, more production errors might be made.
• Remove other known effects, such as inflation, before performing the analysis, or the results are likely to be distorted. Total cost Volume b, fixed costs A, slope is the variable cost per unit per unit.
-
ACCA考试科目难度解析2017
ACCA是"英国特许公认会计师公会"(TheAssociationofCharteredCertifiedAccountants)的简称,是世界上领先的专业会计师团体,也是国际学员最多、学员规模发展最快的专业会计师组织。ACCA会员资格得到欧盟立法以及许多国家公司法的承认。下面是yjbys小编为大家带来的...
-
2016年ACCA考试辅导:设计风险概述
下面YJBYS小编为大家整理了关于ACCA考试审计风险的`知识点,希望对你有所帮助。更多ACCA考试信息,尽在应届毕业生培训网!AccordingtotheIAASBGlossaryofTerms(1),auditriskisdefinedasfollows:‘Theriskthattheauditorexpressesaninappropriateauditopinionw...
-
ACCA考试大纲
引导语:从2001年12月起,ACCA实施新的考试大纲,新大纲主要强调学员掌握核心专业知识,下面就让小编来为大家介绍ACCA考试大纲,希望对大家有所帮助!新大纲共有十四门课程,分为三个部分,具体科目如下:第一部分主要涉及基本的会计原理,财会信息的作用和管理领域的主要问题等...
-
2016年ACCA新考季“小鲜肉”的备考战略竟是这些
耶诞氛围持续发酵,又将迎来一年岁末。2015年,ACCA考生迎来了新政策的试水——3次考试。而到了明年,新的考试政策将正式迈入正轨,ACCA一年四次的新考季正在前方向学员们招手。根据ACCA研究中心调查数据表明,新考季的实施对考生来说是缩短考试战线的利好消...
相关文章
- 托福英语写作范文:Examinations exert a pernicious influence on educat
- 雅思口语范文:My Experience as an English Learner
- 英语口语:Teaching and Learning Responsibility
- 公共英语二级写作Preserving Natural Resources
- Choice of large enterprises or small英语四级作文
- Diaspora Finance Powers Global Development美文欣赏
- 英语阅读:VIT declines to acquire Ang Mo Kio property
- Should Private Cars Be Encouraged in China高中英语作文
- 英语阅读:African Union Leaders Talk Mali, Chinese Investmen
- 英语阅读:Covergirl unveils empowering brand update