How to Write Probability Notations
When finding probabilities for a normal distribution (less than, greater than, or in between), you need to be able to write probability notations. Practice these skills by writing probability notations for the following problems.
Sample questions

Write the probability notation for the area shaded in this Zdistribution.
Answer:
Looking at the graph, you see that the shaded area represents the probability of all zvalues of 2 or less. The probability notation for this is

Write the probability notation for the area shaded in this Zdistribution.
Answer:
Looking at the graph, you see that the shaded area represents the probability that Z is between 0 and 2, expressed as

Write the probability notation for the area shaded in this Zdistribution.
Answer:
Looking at the graph, you see that the shaded area represents the probability of a zvalue of –2 or higher, expressed as
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