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### 35 Cards in this Set

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 all measurements or observations of interest population part of a population sample numerical descriptive measurement of a population population parameter numerical descriptive measurement of a sample statistic probability distribution for the statistic and the sample being used sampling distribution standard deviation of a statistic standard error an estimate of a population parameter given by a single number point estimate magnitude of the difference btwn. point estimate and true parameter value error of an estimate measurement used to determne the reliability of an estimate confidence level the values on a curve where the area btwn. the interval is equal to the deseired confidence level critical values a variable used instead of Z when the sample size is small Students T-variable the value which influences the t-variable by sample size degrees of freedom samples taken from two populations so that the way it is taken from on epopulation is unrelated to the selection of the samples from the other independent samples samples taken from two populations so that the way it is taken from one population can be naturally paired with a measurement from the other sample dependent samples an assumption about one or more population parameters of a probability distribution statistical hypothesis the procedure whereby the decision is made to reject or not reject a hypothesis hypothesis testing hypothesis which is designed for the purpose of seeing whether or not it can be rejected null hypothesis hypothesis constructed in such a way that it is one to be accepted when the null hypothesis must be rejected alternate hypothesis error of rejecting the null hyp when it is in fact true Type I error error of accepting the null hypothesis when it is in fact false type II error probability with which it is "allowable" to risk a type I error level of significance probability of rejecting Ho when it is in fact true power of a test problems where variables are studied simultaniously to see how they are interrelated correlation problems problems where the value of interest is predicted by going back ot the values of other related variables regression problems values representing two variables which are corresponding paired data values independed value explanitory value dependent value response variable predicting response values for explanitory values that are btwn. the explanitory range of the data interpolation predicting response values for explanitory values that are out of the range of the data extrapolation method for measuring the spread of the set of pts. about the least square line that is similar to standard deviation standard error of an estimate unitless measurement to describe the strength of the linear association that exists btwn. two variables regardless of which is listed first Pearson product how well a random sample of data pairs indicates a high correlation to the population data significance of r a measurement of how well the least squares line is as an istrument of regression coefficient of determination the actual obsereved data of any sample observed frequency probability of the data assuming independence expected frequency