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Answer: 0.0432
Step-by-step explanation:
Formula of Margin of Error :-
Given : Sample size : n= 400
The proportion of individuals use public transportation.=
Level of confidence = 0.95
Significance level :
Critical value :
Substitute the values in the given formula , we get
Hence, the margin of error for the confidence interval for the population proportion with a 95% confidence level. = 0.0432