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35 Cards in this Set
 Front
 Back
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 Tvariable


the value which influences the tvariable 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
