Question 1137701
Probability (P) ( X > or = 30) = 1 - P( X < 30 )
:
z-score(30) = (30 - 22)/3.8 = 2.1053 is approximately 2.11
:
look in z-tables for the corresponding probability
:
P ( X > or = 30) = 1 - 0.9826 = 0.0174
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