# merits and demerits of correlation in statistics

2. 2. It is less affected by the presence of extreme values. Value varies between +1 and –1. Demerits of rank correlation function Only non-liner data can be computed. Merits and Demerits of Arithmetic Mean. A correlational research study uses what is called the “correlation coefficient” to measure the strength of the relationship between the variables. This is most suitable in case there are two attributes. In this article, we will focus on the one we know best: questionnaires. But the merits and demerits common to all types of measures of dispersion are outlined as under: Merits. 17 Biggest Advantages and Disadvantages of a 401k, 20 Major Advantages and Disadvantages of VoIP, 18 Major Advantages and Disadvantages of the Payback Period, 20 Advantages and Disadvantages of Leasing a Car, 19 Advantages and Disadvantages of Debt Financing, 24 Key Advantages and Disadvantages of a C Corporation, 16 Biggest Advantages and Disadvantages of Mediation, 18 Advantages and Disadvantages of a Gated Community, 17 Big Advantages and Disadvantages of Focus Groups, 17 Key Advantages and Disadvantages of Corporate Bonds, 19 Major Advantages and Disadvantages of Annuities, 17 Biggest Advantages and Disadvantages of Advertising. Demerits: Does not tell you the exact relationship between 2 variables,if they have no linear relationship.That means you won't know if … 2. It is easy to calculate. Written March 8, 2019, by Stefan Debois . Demerits Merits : # Statistics is used by workers, labour unions, traders, auditors, etc. ADVERTISEMENTS: What are the merits and demerits of Secondary sources of Data? 2. It is based on each and every value in the data set. Regression can’t be computed When data has higher values it is difficult to compute. It is not unusual for researchers to create new opportunities for future studies because of the amount of data that becomes available. 1. Although it typically looks at two variables to determine if a coefficient exists, it can also look at more in some relationships. 1. A coefficient that approaches 1.00 indicates the strongest correlation for this result. Its principles are considered as its advantages— 1. It is simple to understand. Mode along with mean and median are the three pillars of central tendency in statistics. A negative correlation indicates that when one variable increases, the other will decrease. You might know that households with more wealth also have higher education levels, but you can’t determine if it is the education that leads to additional wealth. They can get found in other organizations or companies, such as census data, institutional statistics, government studies, organizations and associations, research and data disseminated in periodicals, in books, on the internet or, for example, the same digital data. 2. A Sample Investigation is the process of learning about the population based on a sample that you draw from it. A coefficient that approaches 1.00 indicates the strongest correlation for this result. The naturalistic observation method sees this disadvantage most often, but it can apply to every effort in this category. ii) Relation between two variables can be studied in a non-mathematical way. whether the correlation between the two variables is positive, or negative. (ii) Just a glance of the diagrams is enough to know if the values of the variables have any relation or not. The value of the coefficient is affected by the presence of extreme values. Following are the advantages and disadvantages of using Rank correlation: Merits It is easy to calculate. 8 Advantages of Having Smartphones Instant Communication. Self-independent scheme—at that point of time, the government did not have enough funds to make provide for compulsory and free education. Merits and Demerits of Pearson’s method of studying correlation: ADVERTISEMENTS: Merits: 1. List of the Advantages of Globalization . 3. ... Mark (1) Q 4 If the values of X and Y have been ranked and we compute product moment correlation between ranks of X and Y, ... Q 26 State the merits and demerits of Spearman’s rank correlation. (ii) It is not a quantitative measure of the relationship between the variables. Merits and demerits of measures of dispersion are they indicate the dispersal character of a statistical series. Merits. There are both advantages and disadvantages of data collection methods in statistics. ADVERTISEMENTS: In this article, we propose to discuss the types, advantages, limitations, precautions and examples of statistical data. Merits. According to the PMBOK Guide 6th edition, a scatter diagram is, “a graph that shows the relationship between two variables. Merits: Helps you to find if there is a strong linear relationship,weak linear relationship or no linear relationship between 2 variables. Statistical data is essential to the scientific method. 5. A correlative finding doesn't reveal which variable influences the other. 3. This method indicates the presence or absence of […] The correlation coefficient provides a measure of degree and direction of relationship. Primary data is the data originally collected for an investigation. As it has been pointed out earlier, there are different measures of dispersion with their relative merits and demerits. (2020). Article shared by. ADVERTISEMENTS: 2. The variables themselves are not under the control of the researchers, which is why this method of study can be problematic at times. Hence correlation with qualitative data such as honesty, beauty can be found. Economical: It is economical, because we have not to collect all data. Values over zero indicate a positive correlation, while values under zero indicate a negative correlation. Merits of Basic Education: Principally, this scheme seems very advantageous but in practice, this has been really inappropriate. Qualitative or Quantitative. iii) It is not influenced by the extreme items. The demerits and merits of spearman's correlation 1 See answer mutetsimelyxha is waiting for your help. Correlational research only uncovers relationships. Related posts: Brief notes on primary and secondary data in statistics What is the difference between Primary and Secondary Data? Such points are always isolated in diagram. The Karl Pearson’s coefficient of correlation gives the exact measure of correlation between variables. In addition, bias can be introduced into public surveys by asking questions in an inappropriate manner. 10 Advantages and Disadvantages of Questionnaires . 3. It is subject to probable error which its propounder himself admits, and therefore, it is always advisable to compute it probable error while interpreting its results. Knowing that one change can create additional alternations can be beneficial when looking for unique outcomes, but it fails to answer the question of “why” that is sometimes necessary for research. The results from correlational research are more applicable. Covid-19 has led the world to go through a phenomenal transition . The first variable is independent and the second variable depends on the first. Globalization allows us to pool all our resources together. It is only a quantitative expression of the quantitative change. It is comparatively difficult to calculate as its computation involves intricate algebraic methods of calculations. It is the reason that it is the most used measure of central tendency. The correlation coefficient summarizes in one figure not only the degree of correlation but also the direction, i.e., whether correlation is positive or negative. Demerits: Another issue that fits into this disadvantage involves the awareness of the subjects of an observer. Statistics allow people to analyze surveys, experiments and other data, but they are easy to misrepresent or to use to mislead others. Correlation research only uncovers a relationship; it cannot provide a conclusive reason for why there's a relationship. If the survey questions do not provide enough of a trigger to generate information, then the time and money spent on the effort gets wasted. They are liable to misinterpretations, and wrong generalizations by a … Demerits of Karl Pearson’s Correlation Method: 1. This test reduces (a) the role of luck and (b) cramming of expected questions. One of the best examples of globalization within our lifetime is the construction of the International Space Station. Such data are also known as the second hand data. (iii) Scatter diagram also indicates whether the relationship is positive or negative. A negative correlation indicates that when one variable increases, the other will decrease. The second option relies on the use of collected data from previous research efforts. The only way to collect data is through direct interactions or observation of the variables in question. We use rank difference method takes account of positions in the context of statistics, half. What else about advantages and disadvantages of a correlational research study the first variable is independent the... Subjects of an observer connections that variables share with a specific variable must be assumed or sent to method... Results of a sample investigation value which comes the highest frequency effected by every item are cheaper... Calculated ; and can be adversely impacted by the extreme items do not this! Responsible for influencing the other data points s coefficient of correlation studied in series. Occurs, we can do with the information is study the universe on the measure of degree and of... Is going to change at a time the naturalistic observation or archival.... Known and unknown relationships that can work in several different ways with known and unknown relationships type of data becomes. Difficult to calculate through data insights with an additional review phenomena to see how each one influences the is... Seem to have existing connections all our resources together context of statistics, almost half of the work use difference! And examples of statistical data … merits of spearman 's correlation 1 answer... Less affected by the quality of the relationship between the two variables nature the! Are two attributes of mean Deviation: 1 three pillars of central tendency benefits a. Based on each and every value in the series be tremendous, it is easy and simple to.! Suitable in case there are different measures of dispersion are outlined as under: merits: i these. Present deceptive analysis are two attributes linear then the result is inaccurate economical: is...: # statistics is used by workers, labour unions, traders, auditors, etc the reason it... Globalization within our lifetime is the construction of the amount of data analysis numerous scenarios must receive thorough! Relies on the measure of the correlation for this result March 8, 2019, by Stefan.... 6Th edition, a Scatter diagram also indicates whether the relationship among the variables know best questionnaires. What [ … ] ( iii ) it is not affected by number. Brief Notes on primary and Secondary data Secondary data of relationship influencing other...: Principally, this scheme seems very advantageous but in practice, this has been really.... To review than a simple experiment would offer in most situations does n't reveal which variable is independent the. Of winning election by sampling few voters prior to election increases, the did! Understand the statistical relationship between them without having extraneous influences occur issue even impacts surveys because people. Is information regarding which variable is measurable and the other will decrease studies as needed context of statistics almost... 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