# Math statisticstranses

Chapter 4: statisticsWhat are Statistics?Refers to the collection, organization,summarization, presentation, and interpretation ofdata.2 types of Statistics:••Descriptive – The branch of statistics thatinvolves the collection, organization,summarization, and presentation of dataInferential – The branch that interpretsand draws conclusions from the dataSection 4.1: measures ofcentral tendencyWhat is Central Tendency?In statistics, a central tendency is a central ortypical value for a probability distribution. It mayalso be called a center or location of thedistribution.One of the most basic statistical concepts involvesfinding measures of central tendency of a set ofnumerical data.3 types of averages that is a measure of centraltendency for the numerical data:• Arithmetic Mean• Median• ModeThe arithmetic meanThe arithmetic mean, or simply the mean or theaverage, is the sum of a collection of numbersdivided by the count of numbers in the collection.The mean of n numbers is the sum of thenumbers divided by n =Σ A population is the pool of individuals from whicha statistical sample is drawn for a study or theentire group under consideration. The populationmean is denoted by (lower case mu)A sample is any subset of the population, and thesample mean is denoted by x̄ (x bar)The Medianthe median is the middle number or the mean ofthe two middle numbers in a list of numbers thathave been … Purchase document to see full attachment

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