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formation of continuous frequency distribution continuous frequency distribution is most popular in practice with reference to the formation
frequency distributiona frequency distribution is a series where a number of items with similar values are put in separate groups or bunches in other
statistical errors statistical data are obtained either by measurement or by observation hence to think of perfect
sequential samplingunder this method a number of sample lots are drawn one after another from a universe depending on the results of the earlier
cluster samplingthis method is also known as multi stage sampling under this method random selection is made of the ultimate or final units from a
convenience samplingit means a convenient sample is obtained by selecting convents units from the universe convenient sample is also known as chunk
quota samplingunder this method enumerators shall select the respondents in place of those not available as per the quota fixed according to
purposive or judgement samplingunder this method of sampling the choice of selection of sample items from the universe depends
multi stage or cluster random sampling under this method the random selection is made of primary intermediate and final units from a given
systematic random samplingthis method is generally used in such cases where a complete list of the population is available from which sample has
stratified random samplingthis method of sampling is used when the population is comprised of natural subdivision of units the method consist in
random sampling methodin this method the units are selected in such a way that every item in the whole universe has an equal chance of being included
classification of universethe universe may be classified either on the basis of number of units and on the basis of existence of units as is
universe or populationthe word universe as used in statistics denotes the aggregate from which a sample is to be taken according to simpson and kafka
scheduleschedule is also used for the collection of primary data a schedule is a list of question it is a device of obtaining answer to the questions
framing of questionnairequestionnaire is a schedule of questions which is sent to the respondents for filling in by them in their own handwriting
primary and secondary dataprimary data these data are those are collected for the first time thus primary data are original in character and
main stages of statistical inquirythe following are the various stages of a statistical inquiry1 planning the inquiry first of all we have to
1se toma una muestra de 81 observaciones con una desviaci243n est225ndar de 5 la media de la muestra es de 40 determine el intervalo de de
marks in law 10 11 10 11 11 14 12 12 13 10 marks in statistics 20 21 22 21 23 23 22 21 24 23 marks in law13 12 11 12 10 14 14 12 13
statistical process controlthe variability present in manufacturing process can either be eliminated completely or minimized to the extent possible
steps in anovathe three steps which constitute the analysis of variance are as followsto determine an estimate of the population variance from the
assumptions in anovathe various populations from which the samples are drawn should be normal and have the same variance the requirement of normality
simulationwhen decisions are to be taken under conditions of uncertainty simulation can be used simulation as a quantitative method requires the
analytical approachwe will illustrate this through an exampleexample 1a firm sells a product in a market with a few competitors the average price