central limit theorem confidence interval consent rate convenience sample interval estimate point estimate random sample representative sampling distribution sampling error self-selection bias standard error of the mean | the percentage of targeted subjects who agree to participate in a study. a range within which it is estimated, based on a sample value, that a population value falls. an estimate of a population value that says the population value falls somewhere within a range of values. a sampling strategy in which each case in the population has an equal chance of being selected. a statement about the shape that a sampling distribution of the mean takes if the size of the samples is large and every possible sample were obtained. a nonrepresentative sample that may occur when the subjects who agree to participate in a research study differ from those who choose not to participate. a sampling strategy in which cases are selected for study based on the ease with which they can be obtained. an estimate of a population value that is a single value. discrepancies, due to random factors, between sample statistic and a population parameter. a frequency distribution generated by taking repeated, random samples from a population and generating some value, like a mean, for each sample. the standard deviation of a sampling distribution of the mean. the attributes of the population are present in the sample in approximately the same proportion as in the population. |