Calculate the standard error for p=0.5p = 0.5p=0.5 and n=300n = 300n=300.
sqrt0.25/30\\sqrt{0.25/30}sqrt0.25/30
sqrt0.5/300\\sqrt{0.5/300}sqrt0.5/300
sqrt0.5/30\\sqrt{0.5/30}sqrt0.5/30
sqrt0.25/300\\sqrt{0.25/300}sqrt0.25/300