CK-12 Basic Probability and Statistics - A Short Course

(Marvins-Underground-K-12) #1

3.1. Discrete Random Variables http://www.ck12.org


Let’s say you want to see one coin being tossed ten times. Here is what the calculator will show and the key strokes
to get to this sequence. Try it on your own.


We can actually see how many heads and tails occurred in the tossing of the 10 coins. If you click on the right arrow
(>) the frequency label will show you how many of the tosses came up heads.


We could also userandBinto simulate the tossing of a coin. Follow the keystrokes below.


This list contains the count of heads resulting from each set of 10 coin tosses. If you use the right arrow (>) you can
see how many times from the 20 trials you actually had 4 heads.

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