What are the merits and demerits of primary and secondary source of data in statistics?
Reliable and comprehensive statistics can be very expensive to collect and process. You may not have the authority to force compliance and so your data may have serious gaps. These pitfalls can be avoided if there are suitable secondary statistics that have already been compiled. However, you may not know exactly how the statistics were compiled and processed so may not fully know what they represent. Also, they may not measure exactly what you want or may not be based on the exact target population. These demerits can be overcome by collecting the statistics yourself.
Primary is original (radio broadcast about an important event, newspaper article, book, evidence from the discussed person him/herself, original photo or picture; secondary is… when somebody writes about the original one, including his or her opinion, you hear somebody talk about his assumed thought about an event (in which he/she did not take part.
Secondary data helps in reducing time, effort and money required for the collection of data.. It is easily available. It can be obtained from Text books, net etc.
Primary data refers to data that is obtained from a first-handexperience. Secondary data, on the other hand, refers to data thathas been gathered by others.
A Primary source is information directly from the source. A Secondary source is infomation from other source. A primary source was written or created in the relevant time pe…riod or a person who experienced that time and relevant event(s). A Secondary Source is normally one who did not participate in relevant events but rather one who is commenting on or reporting what was learned from Primary Sources.
primary data structures
Statistical data refers to data being taken from someone elsesfindings
they are created by people who have never experienced thehistorical period they described
MERITS OF STATSTICS Presenting facts in a definite form Simplifying mass of figure- condensation into few significant figures Facilitating comparison Helping in formulati…ng and testing of hypothesis and developing new theories. Helping in predictions. Helping in formulation of suitable policies. LIMITATION OF STATSTICS Does not deal with individual measurement. Deals only with quantities characteristics. Result is true only on an average. It is only one of the methods of studying a problem. Statistics can be measured. It requires skills to use it effectively, otherwise misinterpretation is possible It is only a tool or means to an end and not the end itself which has to be intelligently identified using this tool.
Statistics is important in many ways. For instance, it helps indecision-making, they are easy to analyze, they prove important forbenchmarking purposes and they ensure informa…tion is collected in astandardized way. On the other hand, they present such demerits astime consuming, inability to evaluate user opinions and thatstatistics is not appropriate when it comes to in-depthunderstanding of issues.
What is the difference between primary and secondary sources of reading and primary and secondary sources of data?
I've never heard of primary vs. secondary sources of reading , but I can provide an answer on primary vs. secondary sources of data . A secondary source of data is data th…at was collected for a reason other than the task at hand. A good example is US Census data. Marketers might use census data as input into decisions. An example of application of this data is as follows. Suppose you want to distribute your product in the 5 most populated cities in the US. You could find this info from census data, and go about distributing your product in those 5 cities. A primary source of data is data that is collected specifically for the task at hand, often via a market research study. For example, if you wanted to know what features of your product are most valued to buyers, you would design a market research study (i.e. questionnaire) to find that out. At the end of your study, you'd have the data to answer your question. --- Note that there is quite a trade in used data. There's nothing wrong in this, provided all the relevant information about things like the purpose and reliability and possible sources of distortion of the old data are taken into account.
PRIMARY DATA MERITS 1. it gives valid information 2. you can observe finer nuances as in the case of interview or observation method 3. as in questionnaire, the anonim…ity of respondent is preserved DEMERITS 1. it can be difficult to gain access to the sample 2. the sample may behave unnaturally in the presence of the interviewer 3. personal bias may affect the outcome 4. it can be time consuming SECONDARY DATA MERITS 1. a variety of information 2. variety of opinions 3. in depth information 4. time saving DEMERITS 1. the data may be inaccurate 2. the data may be outdated 3. personal bias of researcher may affect the result 4. the information may not always be relevant
primary data is where you get o fact off a computer or from a book secondary data is where you get a fact of someone and it might not be true
Answer if this question concerns literature, not electricity. Primary Source : This is your main source, a source that was recorded when the event happened. Secon…dary Source : A source based on other sources e.g. a book about the event or a biography written by person A about person B. (An autobiography is an example of a primary source because someone wrote it about his or her own life. ) Answer if this question concerns electricity, not literature. Primary Source : A non-rechargeable chemical battery which can produce a useful output current when a load is applied to it. It does not store electric charge and it cannot be re-charged when its supply of electric current has been used up. Secondary Source : A rechargeable chemical battery which can produce a useful output current when a load is applied to it. It stores electric charge and can be re-charged when its supply of electric current has been used up.
Secondary = finding existing info Primary = creating, researching this new info
merits and demerits of index number
A big advantage of statistical mode is that it is not restricted to numbers alone. For example, among all the letters of the English alphabet, the mode is the letter 'E', whic…h is the most frequently encountered letter. However, we cannot define the median or mean letter, since these can only be defined for numbers. This makes the scope of the mode quite broad in nature. The mode (the most reoccurring number) is generally not a very good estimator because there is nothing saying it is necessarily related to the true middle and it could easily just be a number of chance. It can be calculated when table ends are open, the mode is not a helpful measure of location, because there can be more than one mode or even no mode.