Look at the following output, which compares the amount of movement measured in patients with Multiple Sclerosis after treatment (0 = no movement, 5 = much movement) with those patients waiting for treatment (control group)

12. Which is the most appropriate conclusion?

a) Scores in the treatment group are more variable than the control group

b) Scores in the control group are more variable than the treatment group

c) The groups have identical variances

d) It is not possible to determine which group has the most variance

Transcribed Image Text:

Group Statistics Group N Mean Std. deviation Std. error mean movement treatment group 12 4.00 .853 246 control group 12 1.67 1.435 .414 Levene's Test for quality of variances Independent Samples Test t-test for equality of means 95% Confidence interval of the difference Sig. Mean Std. error Sig. t df (2-tailed difference difference Lower Upper movement Equal 3.667 069 4.841 22 .000 2.333 .482 1.334 3.333 variances assumed Equal 4.841 17.905 .000 2.333 482 1.320 3.346 variances not assumed