AP Statistic Inference FRQ Hacked - How to Score a 5

[@asingh4361]

Thanks for the video! How do we know when to use a z* or t*?

[@macadamia5074]

Z is used when the population standard deviation is known while t is used when population standard deviation isn't. For means most of the time it will be t but it can be z. For proportions it will be z.

[@asingh4361]

thank u ‼️

[@denysromashchin5424]

means for t and z for proportion