Re: Carry on, Imran Khan
Although I agree the survey is biased towards opinions from middle class urban population but the instrument is not like you score out of 100%.
They ask all respondents if they favorably or unfavorably view Mr. A, Mr. B, Mr. C… and so forth. It is possible that a person who favorably views IK, also has positive impression of NS and also for Zardari. The percentages do not have to add up to 100%. It just says that out of all people asked the questions, 70% had positive impression of IK. It is possible that many out of these people also have favorable view of NS or Zardari.
The favorable% + unfavorable% + neutral% + no response% for EACH politician would equal 100%.