3 Key Terms Sample Population Sampling Statistic Representative of the populationCommonly symbolized with Roman LettersPopulationParameterCommonly symbolized with Greek LettersSamplingRandom SampleRandom Assignment
7 Key Terms Descriptive Statistics Inferential Statistics Measures of Central TendencyMean, Median, ModeMeasures of VariabilityRange, Standard Deviation, VarianceInferential StatisticsParametricNonparametric
20 Summation Notation () One of the most common symbols in statistics is the uppercase Greek letter sigma, (), which is the standard notation for summation.It is readily translated as “add up, or sum, what follows.”The general rule, which always applies, is to perform operations within parentheses before performing operations outside parentheses.
21 Common Statistical Symbols X A Raw ScoreMean of a Sample Mean of a Populations Standard Deviation of a Sample Standard Deviation of a Populations 2 Variance of a Sample2 Variance of a Population
22 Key Terms Probability Confidence Intervals Effect Size Standard Scores = Level of Significancep = Probability (Sig.)Confidence IntervalsEffect Sized Familyr FamilyStandard Scoresz