Sample Mean vs Sample Proportion: When To Use Which
This video teaches you to spot which Central Limit Theorem problems should be approached using sample means and the related formulas, versus which problems require the sample proportions approach.
Central Limit Problems Using Sample Means
This video covers how to do Central Limit Problems which require the sampling mean approach. These are the problems that give you the mean and standard deviation of some population, then ask you the probability that the mean of a random sample will be either more or less than that. Z-values and calculator, hear we come!
Central Limit Problems Using Sample Proportions
This video covers word problems requiring the sample proportions versions of the Central Limit Theorem formulas. These problems always start by giving you the percentage of a population that has a certain characteristic, then ask you the probability that the proportion of a random sample will be either greater or less than that of population at large. Z-values and calculator, hear we come!
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)