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### 53 Cards in this Set

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 mean, median, mode, Frequency distribution of grouped and ungrouped data chapter 2 Histograms from data p.49 Measuring Central Tendancy pp 109, 107, 125 find the mean of distribution sampeling using xbar pp 124-125 and 126 probablility favorable vs. total favorable/total pp 182 probability it will happen probability it won't happen addition rules for probability p 194 4-3 factoral pp221 permutation is an of objects in a specific order pp 224\ using probability use combinations in one place rules for probability Discrete probability standard deviation of probability chap 5-1 Nominal level of measurement zip codes, gender, political affiliation Ordinal level of measurement can be ranked, abcd, first, second Interval-Level data ranks data and precise differences between units of data, howver no meaningful 0, sat score Ratio level of measurement posseses all charictoristics of interval measurement and there exists a 0, height, weight, salary, age four measurement scales nominal, ordinal, interval, and ratio What is probability Qualitative are variables that can be classified in distinct categories Quantitative are numerical and can be numbered or ranked Discrete variables assume values that can be counted countinous variables can assume an infinite number of values between any two specific values. They are obtained by measureing. Often are fractions and decimals. independent variable in an experimental study is the one that is being manipulated by the researcher the independent variable is also called the explanitory variable the dependant variable is the resultant variable or the outcome variable descriptive statistics consists of the collection, organization, presentation and summarization of data. inferential statistics consists of generalizing from samples to populations, performing estimations and hypothesis tests, determining relationships among variables, and making predictions. Discrete variables assume values that can be counted random sample are chosen by chance mean arithmetic average median score that has as many x's above and below Mode score that occurs most frequency the number of times the number repeats Permutation a permutation is an arrangement of n objects in a specific order Factoral ! 5!=5*4*3*2*1=120 probability is equal to favorable / total symbol μ (Greek: mu) is used to denote the arithmetic mean of an entire population s sample standard deviation s sq sample variance σ popoulation standard deviation σ sq Population variance Σ Summation notation Xbar Simple mean ! factorial nPr number of permutations of n objects taking r objects at a time. In a certain order nCr Number of combinations of n objects taking r objects at a time Counting rules fundemental toss a coin and roll die = 2x6 or 12 and repititions are permited Counting rules permutation repitions are not permited, then the numbers decrease by 1 for each place left to right. 5! = 5*4*3*2*1=120 Counting rules combination total combination possibles Data aray when data is sorted in order