Question 1029927
I will make it a 2 way test.
Ho: The true proportion is 0.435
Ha: The true proportion is not 0.435,
alpha=0.01
the confidence interval is from a 1-sample proportion test
z(0.995)*sqrt {(0.435)(0.565)/1908}; z=2.576; the standard error is 0.0113
z*SE=0.0292
99% CI=(0.391,0.449).  The value of 0.42 is in the interval, so the null hypothesis is not rejected. There is insufficient evidence to support the claim that there was bias.