A researcher wants to determine if students in the California state university system take longer to graduate than students enrolled in private universities. One hundred students from the California state university system are surveyed and it is determined that they have a mean time to graduation of 5.7 years with a standard deviation of 1.5 years. One hundred private university students are surveyed as well, and their average time to graduation is 4.8 years with a standard deviation of 1.2 years. Find an estimate to determine how much longer California state university students spend, on average, taking to graduate than private university students. Select an answer 2-Sample T-Interval 2-Sample T-Test 1-Proportion Z Test 2-Proportion Z-Interval What Procedure would you use Question Help: Post to fon Submit Question Jump t