Answer:
The standard error of proportion = 0.0301
Explanation:
Explanation:-
a) Given the psychic was presented with 200 cards face down and asked to determine if the card featured one of five symbols: star, cross, circle, square, or three wavy lines.
The sample size 'n' = 200
Given the psychic was correct in 48 cases.
The sample proportion of given data

Standard error of proportion:-
The standard error of proportion


Conclusion:-
The standard error of proportion = 0.0301