Respuesta :
Answer:
The standard error of proportion = 0.0301
Step-by-step 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
[tex]p = \frac{48}{200} = 0.24[/tex]
Standard error of proportion:-
The standard error of proportion
[tex]S.E = \sqrt{\frac{p(1-p)}{n} }[/tex]
[tex]S.E = \sqrt{\frac{0.24(1-0.24)}{200} } = \sqrt{0.000912} = 0.03019[/tex]
Conclusion:-
The standard error of proportion = 0.0301
