Aresearcher wishes to see whether the variances of the process (in seconds) on machine a are different from the variances of process (in seconds) on machines other than machine a. the researcher selects two samples, and the data are below. using a = 0.05, the researcher tests to see if enough evidence exists to support the claim. for machine a, n1 = 16 and = 18. for machines other than machine a, n2 = 18 and = 16. what is the test value f

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.