Poverty Point is the name given to a number of widely scattered archaeological sites throughout Louisiana, Mississippi, and Arkansas. These are the remains of a society thought to have flourished during the period from 1700 to 500 B.C. Among their characteristic artifacts are ornaments that were fashioned out of clay and then baked. The following table shows the dates (in years B.C.) associated with four of these baked clay ornaments found in two different Poverty Point sites, Terral Lewis and Jaketown (86). The averages for the two samples are 1133.0 and 1013.5, respectively. Is it believable that these two settlements developed the technology to manufacture baked clay ornaments at the same time? Set up and test an appropriate H0 against a two-sided H1 at the α = 0.05 level of significance. For these data sx = 266.9 and sy = 224.3.

Terral Lewis Estimates, x Jaketown Estimates, y 1492 1169 883 988 1346 942 908 858