along with reading chapter 9, you may want to take a look at these power points on sampling distributions:

https://www.glastonburyus.org/staff/EisenbergB/APStatistics/Documents/Chapter%2018%20powerpoint.ppt

https://www.glastonburyus.org/staff/EisenbergB/APStatistics/Documents/Chapter%2019%20Powerpoint.ppt

 

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