A random sample of n=1100 registered voters and found that 570 would vote for the republican candidate in a state senate race. Let p represent the proportion of registered voters who would vote for the republican candidate.
H0: p=.50
Ha: p > .50
a) The test statistic is z=____
b) Regardless of what you actually computed, suppose your answer to part a was z=1.28. Using this z, p value =___