.Discrete math. Any idea?
If you want a poll to be accurate within 5 percent with 90 percent confidence, what roughly is the number of people we should ask.
Number of people (n) is given by:
Given:
= 0.10
From Table critical values of Z = 1.645
e = 0.05
Since p is not given, take p = 0.5.
Substituting, we get:
So,
Answer is:
271
.Discrete math. Any idea? If you want a poll to be accurate within 5 percent with 90 percent conf...
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