which scenario is best for studying variability in biological research? what is the purpose of a datapoint in research what is the difference between scenario one and scenario two what is scenario 2 used for? why is scenario 2 a valid study how to find how many people can be monitored with the same data point how does a scenario of multiple measurements of the same patient relate to a t test? how is predicting variability used why use variability in research what to do with a single measure of the average heartbeat of a person what is the cost of scenario two what is the cost of doing a t-test for the second scenario? what to do if a random heart rate reading is used in scenario two and three why do researchers use multiple measures of the heart rate? what to do with the variability what is the standard deviation in scenario 1 what would be considered as a single measurement of a single datapoint? what is the difference between scenario 1 & scenario 2 what is the cost of doing multiple measurements in a study? what is the cost of scenario 2