The scores on a standardized test for 317 students in nontraditional math classes were compared to the scores of 266 students in traditional math classes. Computer software was used to create a confidence interval for the difference in mean scores. Complete parts a through d.

Conf level: 90%

Variable: (NonTrad)(Trad)

Interval: (5.353, 11.247)

a) What is the margin of error for this confidence interval?

b) If a 98% confidence interval is created, would the margin of error be larger or smaller?

c) Explain what the calculated interval means in this context.

d) Does this result suggest that students who learn mathematics with nontraditional methods will have significantly higher mean scores on standardized tests than those in traditional classes? Explain.