what is the relationship between the number of participants in each program and the proportion of their time spent each program? how many times can you increase the proportion of time spent in a program does the proportions change in time? how many hours do participants spend on each program how does the proportion change over time which test measures the proportional change in time between programs what is the proportion of time spent in each program? how many hours does a participant spend in programs which test measures proportional change how to test a change in time over time how do you test for program variation pt test to determine whether the duration of each program change over time how to test for change in time how to test for proportional change what measures are used to test for proportional change does the proportion of time spent in each program change over time? how to test for proportional change how to predict whether time and time in each program have changed? why do we test for change over time how to test for proportional change