Probability

Notes for Wednesday March 4 (1A) and Thursday March 5 (2B and 3B)

First, how to find the probability using the GRAPH of the NORMAL CURVE:

• The PROBABILITY of a value being LESS THAN  some given number:

• The PROBABILITY of a value being BETWEEN two given numbers:

• The PROBABILITY of a value being MORE THAN some given number:

Next, how to calculate the Z-SCORE:

And finally, how to use find the probability using the Z-TABLE or the CALCULATOR:

(Remember for the calculator: [2nd] [VARS] [2], then the LOWER, the UPPER, the MEAN, and the STANDARD DEVIATION.)