Statistics 214 Test Correctly Solved
Statistics - procedure of collecting, analysing and concluding based on information Population - entire set of individuals about which information is sought Sample - the subject of the population which is actually being observed Types of sampling - simple random sampling. Stratified sampling. Sampling of convenience. Cluster sampling. Systematic sampling. Voluntary response. A statistic - a number that describes a sample A parameter - is a number that describes a population. Example: 57% of the teachers @ UL - answer: sample= the teachers. Parameter= 57% Variable - characteristics of the individuals involved. Types of data based on types of variables. Examples: majors, final score, grades (Qualitative & Quantitative) Qualitative - classifies the individual into categories of Ordinal (natural order) & Nominal (no natural order) Quantitative - tells how many or how much there is. Dealing with #. Discrete (can be listed) & Continuous (involves decimals, not set) Frequency - the number of times a category appeared in data Frequency distribution - the table form of the data that presents each category with their frequency Relative frequency - the proportion of a category in the data.
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