PROCEDURE FOR TESTING OF HYPOTHESIS

PROCEDURE FOR TESTING OF HYPOTHESIS a)State the Null Hypothesis as well as the alternative hypothesis In the context of statistical analysis, we often talk about null hypothesis and alternative hypothesis. The null hypothesis is generally symbolized as Ho. Null hypothesis states that there is no difference between the parameter and the statistic that is being Read more about PROCEDURE FOR TESTING OF HYPOTHESIS[…]

HYPOTHESIS TESTING

HYPOTHESIS TESTING The purpose of statistical inference is to draw conclusions about a population on the basis of data obtained from a sample selected from that population. Hypothesis testing is the process used to evaluate the strength of evidence from the sample. It provides a method for understanding how reliably one can extrapolate observed findings Read more about HYPOTHESIS TESTING[…]

SAMPLE QUESTIONNAIRE FOR THE CHOICE OF CAR

SAMPLE QUESTIONNAIRE FOR THE CHOICE OF CAR Given below is a preliminary questionnaire for the choice of small car Dear Sir/madam, We are conducting a survey to find out more about the consumers’ preferences regarding   car. We would be grateful if you could spare a few minutes to participate in it. The information furnished by you will Read more about SAMPLE QUESTIONNAIRE FOR THE CHOICE OF CAR[…]

SCALE OF MEASUREMENT

SCALE OF MEASUREMENT Scaling is the procedure for assignment of numbers or other symbols to a property of objects in order to impart some of the characteristic of numbers to the properties in question. We can assign numbers to indicate the properties of objects. Types of measurement scales a)Nominal Scale: – Nominal scale is simple Read more about SCALE OF MEASUREMENT[…]

GUIDLINES OF FRAMING THE QUESTIONNAIRE OR SCHEDULE

GUIDLINES OF FRAMING THE QUESTIONNAIRE OR SCHEDULE Success of this method greatly depends upon the way in which the questionnaire is drafted. So the investigator must be very careful while framing the questions. The questions should be (i) Short type and clear questions must be given. (ii) The size of the question should be kept Read more about GUIDLINES OF FRAMING THE QUESTIONNAIRE OR SCHEDULE[…]

SOURCES OF DATA

SOURCES OF DATA The sources of data may be classified into (a) primary sources and (b) secondary sources Primary data are always collected from the source. It is collected either by the investigator himself or through his agents. There are different methods of collecting primary data. Each method has its relative merits and demerits. The Read more about SOURCES OF DATA[…]

METHODS OF DATA COLLECTION

METHODS OF DATA COLLECTION The search for answers to research questions calls of collection of data. Data are facts, figures and other relevant materials, past and present, serving as bases for study and analysis. The data serve as the bases or raw materials for analysis. Without an analysis of factual data, no specific inferences can Read more about METHODS OF DATA COLLECTION[…]

SAMPLING TECHNIQUES

SAMPLING TECHNIQUES The choice of an appropriate sampling design is of paramount importance in the execution of a sample survey. Generally, there are two types of sampling techniques; Probability sampling and Non probability sampling. Probability sampling includes the random selection of samples. Simple random sampling, systematic sampling, stratified sampling are the types of random selection. Read more about SAMPLING TECHNIQUES[…]

POPULATION METHOD VERSUS SAMPLE ENUMERATION

POPULATION METHOD VERSUS SAMPLE ENUMERATION For any statistical investigation, the basic problem is to obtain adequate and reliable data relating to the particular variable under study.  There are two sources of data: Population method or complete enumeration. The sample method or partial enumeration. In population method we resort to 100% inspection of the population and Read more about POPULATION METHOD VERSUS SAMPLE ENUMERATION[…]

SURVEY RESEARCH

SURVEY RESEARCH Survey research is the art of collecting information to evaluate behavioural pattern of the sample of individuals. It is a method of obtaining information about a population from a sample. It is often used to judge the opinions of people to different happenings in the surrounding. Survey research is thus the process of Read more about SURVEY RESEARCH[…]