# Question

Viewing 7 posts - 1 through 7 (of 7 total)
• Author
Posts
• #39255

Jose
Participant

I have a take home test due in about 45 minutes and i need to know the answer to this problem.
Fifty-five percent of registered voters in a congressional district are registered Democrats. The Republican candidate takes a poll to assess his chances in a two-candidate race. He polls 1200 potential voters and finds that 621 plan to vote for the Democratic candidate. Does the Republican candidate have a chance to win? Use (sigma)= 0.05
Any help would be greatly appreciated. Thanks so much.

0
#119080

Schuette
Participant

No – hope this helps.

0
#119082

Jose
Participant

I need some math behind it..

0
#119083

Mikel
Member

Depending on what confidence you want – there is about a 25 margin of error, so yes he could win.

0
#119084

Mikel
Member

Make that 2%.

0
#119088

DavidCQE
Participant

Using the formula:  phat – z (1-alpha/2) sqrt(phat*qhat/n)
The 95% lower CI for the proportion voting Democrat is 48.9 % so yes the Republican has a chance to win.

0
#119090

Ken Feldman
Participant

The Republican can only win if the dumb Democrat is from Mass.  Then it is a shoe-in regardless of the polls.

0
Viewing 7 posts - 1 through 7 (of 7 total)

The forum ‘General’ is closed to new topics and replies.