An experimenter is concerned that the variability of responses using two different experimental procedures may not be the same. Before conducting his research, he conducts a pre study with random...

An experimenter is concerned that the variability of responses using two different experimental procedures may not be the same. Before conducting his research, he conducts a pre study with random samples of 10 and 8 responses and gets
and
respectively. Do the sample variances present sufficient evidence to indicate that the population variances are unequal?