The State Bar of California is considering changing its exam structure such that instead of 200 multiple-choice questions, there will be 180. Before making any changes permanent, they first want to collect data to compare the outcomes of the two structures. They have obtained a representative sample of 85 Law students and randomly assigned each to take either the new or old exam. The summarized sample data is given in the table below.

Curriculum	N	Mean	SD
New	42	65.9	5.9
Old	43	63.6	3.2

WORKSHEET 1 Two-Sample T-Test and CI Method My: population mean of Sample 1 Wz: population mean of Sample 2 Difference: 1 - Wz Equal variances are not assumed for this analysis. Descriptive Statistics Sample N Mean StDev SE Mean Sample 1 42 65.90 5.90 0.91 Sample 2 43 63.60 3.20 0.49 Estimation for Difference 95% Cl for Difference Difference 2.30 (0.24, 4.36) Test Null hypothesis Hoi Hi - 12 = 0 Alternative hypothesis H1: 1 - (= = 0 T-Value DF P-Value 2.23 62 0.030