The Core Plus Mathematics Project (CPMP) is an innovative approach to teaching
Mathematics that engages students in group investigations and mathematical
modeling. After field tests in 36 high schools over a three-year period,
researchers compared the performances of CPMP students with those taught using
a traditional curriculum. In one test, students had to solve applied algebra
problems using calculators. Scores for 320 CPMP students were compared to
those of a control group of 273 students in a traditional math program.
Computer software was used to create a confidence interval for the
difference in mean scores. (Journal for Research in Mathematics Education, 31,
no. 3) Conf level: \(95 \%\) Variable: Mu(CPMP) - Mu(CtrI) Interval:
(5.573,11.427)
a. What's the margin of error for this confidence interval?
b. If we had created a \(98 \% \mathrm{Cl}\), 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 CPMP will
have significantly higher mean scores in algebra than those in traditional
programs? Explain.