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.
-
2017ACCA考试报考顺序及学习方法
ACCA一共16个科目,通过14科就可以拿到ACCA准会员证书(最后4科P4-P7是四选二)。这16个科目的考试顺序也是有规定的。16科目分为四个大模块:知识模块(F1-F3)、技能模块(F4-F9)、核心模块(P1-P3)、选修模块(P4-P7)考试必须按照模块顺序来进行,即知识模块-技能模块-核...
-
你是ACCA“学习困难户”吗?这3个方法改变你
ACCA的知识体系非常庞大且繁复,如果考生是自学的话梳理起来会非常困难,因为你简直难以下手!但是ACCA又是非常人性化的,正是因为知识架构涉及面广,所以它的课程设置是循序渐进的,难度呈阶梯状,如果你面对这些知识点还无从下手的话,不妨来看看小编给你支的招吧。ACCA的...
-
学习ACCA有哪些作用
最近碰到很多ACCA学员会问到学习ACCA有什么用,值不值得大家花两三年的时间去攻读,我的答案很明确,值!ACCA是一个让你受益一生的证书,会让你的职业生涯与众不同。首先看看,ACCA的适用性。ACCA是目前全球最大的会计师组织,有10万会员和20多万学员,分布在全球160个国家。...
-
2017年ACCA考试F1十大易混淆知识点
2017年ACCA考试虽然还没有开始。但是为了方便考生更好的`复习ACCA考试F1科目。下面是yjbys小编为大家带来的F1十大易混淆知识点,欢迎阅读。icsector&PrivatesectorPublicsectoristheorganizationownedorrunbythegovernmentorgovernmentagencies.Alltheother...
相关文章
- 英语阅读:Covergirl unveils empowering brand update
- 英语阅读:VIT declines to acquire Ang Mo Kio property
- 公共英语二级写作Preserving Natural Resources
- Should Private Cars Be Encouraged in China高中英语作文
- 雅思口语范文:My Experience as an English Learner
- Diaspora Finance Powers Global Development美文欣赏
- 托福英语写作范文:Examinations exert a pernicious influence on educat
- 英语口语:Teaching and Learning Responsibility
- 英语阅读:African Union Leaders Talk Mali, Chinese Investmen
- Choice of large enterprises or small英语四级作文