Chapter 5 Flashcards
Consent Rate
the percentage of targeted subjects who agree to participate in a study.
convenience sample
a sampling strategy in which cases are selected for study based on the ease with which they can be obtained.
random sample
a sampling strategy in which each case in the population has an equal chance of being selected.
sampling error
discrepancies, due to random factors, between sample statistic and a population parameter.
point estimate
an estimate of a population value that is a single value.
representative
the attributes of the population are present in the sample in approximately the same proportion as in the population.
standard error of the mean
the standard deviation of a sampling distribution of the mean.
self-selection bias
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.
central limit theorem
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.
sampling distribution
a frequency distribution generated by taking repeated, random samples from a population and generating some value, like a mean, for each sample.
interval estimate
an estimate of a population value that says the population value falls somewhere within a range of values.
confidence interval
a range within which it is estimated, based on a sample value, that a population value falls.
