Assume a researcher designs an experiment about the EAS (Elementary Algebra Skills test of the descriptive tests of math

[answerhappygod]

Assume a researcher designs an experiment about the EAS (Elementary Algebra Skills test of the descriptive tests of mathematical skills (DTMS)) scores. Two groups of people randomly chosen from the northern USA (EASN) and southern USA (EASS) took the tests and the researcher is interested in whether or not the two groups differed. H0: uEASN = uEASS vs. HA: uEASN ≠ uEASS (a= 0.10). Assume the population he sampled from was normally distributed (based on ETS reports) with a mean (ux) and a standard deviation (ox≠0), it is "random" sample; the observations were independent; the sample is large; the variances are equal; and, there was no measurement error. The distribution test being used is the z distribution test. The critical values are -1.645 and 1.645. The standard error for the mean is ox sqrt 1/n1 + 1/n2. Is there sufficient evidence at the a level of the experiment?