Stats Exam #3 Conceptual Terms

a procedure for testing a claim about a property of a population.

is the area corresponding to all values of

the test statistic that cause us to reject the null hypothesis

the probability of getting a value of the test statistic that is at least as extreme as the test statistic obtained from the sample data, assuming that the null hypothesis is true

a hypothesis test is the probability 1-b of rejecting a false null

hypothesis. The value of the power is computed by using a particular significance

level a and a particular value of the population parameter that is an alternative to

the value assumed true in the null hypothesis

if the sample values from one population are not

related to or somehow naturally paired or matched with the sample values from the

other population

if the sample values are somehow matched, where the matching is based on some inherent relation-ship.

exists between two variables when the values of one variable are

somehow associated with the values of the other variable

exists between two variables when there is a correlation and

the plotted points of paired data result in a pattern that can be approximated by a

straight line

measures the strength of the linear correlation

between the paired quantitative x values and y values in a sample.

is a correlation that doesn’t have an actual association