Answer: 0.479
Step-by-step explanation:
Based on the information given in the question, we can say that:
A = Americans that believe that statistics teachers know the true meaning of life.
B = Americans that do not believe that statistics teachers know the true meaning of life.
P(A) + P(B) = 1
52.1% + P(B) = 1
0.521 + P(B) = 1
P(B) = 1 - 0.521
P(B) = 0.479