Statistics– the science comprising rules and procedures for collecting, describing, analyzing, and interpreting numerical data Descriptive statistics– collect and describe dataInferential statistics– analyze the data and make decisions or estimates based on information obtained from the dataPopulation– the set of all possible measurements that is of interestSample– the portion of the population from which information is gatheredSimple random sample– items in a sample are usually selected at random from the items that comprise the populationCensus– when a sample consists of the entire populationParameter– the first proportion, the proportion of defective components in the populationStatistic– the second proportion, the proportion of defective components in the sampleDiscrete– the primary difference is that the values in the first data set consist of counting numbers, or integersContinuous– any value over some particular range is possible. There are no gaps in possible values for continuous dataNominal data– are really not numerical at all but are merely labels or assigned valuesOrdinal data– can be arranged in order such as worst to bestInterval data– it is meaningful to add and average such data. (Temperature)Ratio data– differ from interval data in that there is a definite zero point that indicates that nothing exists for the variable being measured (If the value can be twice the strength it is ratio if it is not it is interval)
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one year, Level of measurement, data values, values Ordinal data, data Nominal data