One month before an election in a metropolitan area, a poll of 660 randomly selected voters showed 54% planning to vote for a certain candidate. A week later it became known that he had shared inappropriate pictures of himself, and a new poll showed only 52% of 1010 voters supporting him. Do these results indicate a decrease in voter support for his candidacy. How do I get z= 0.80?
this ironically shows increased number of voters to vote him. however the latter survey was conducted to a bigger crowd and since the percentage is dwindling, then those findings translate to a fall out with voters. 525-352=173