The true statement is that, the probability that 17% to 23% percent of all voters planned to vote is high
The percentage sample error (S) is given as:
S = 3%
The proportion (p) of the respondent is given as:
p = 20%
This means that the range (R) of the proportion is:
R = p ± S
This gives
R = 20% ± 3%
Expand
R = (20% - 3%, 20% + 3%)
Evaluate
R = (17%, 23%)
This means that the range is 17% to 23%
Read more about sampling error at:
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