4.2 Identify the parameter, Part II:  For each of the following situations, state whether the parameter of interest is a mean or a proportion.


(a) A poll shows that 64% of Americans worry a great deal about federal spending and the budget deficit.

(b) A survey reports that local TV news has shown a 17% increase in revenue between 2009 and 2011 while newspaper revenues decreased by 6.4% during this time period.



(c) In a survey, high school and college students are asked whether or not they use geolocation services on their smart phones.



(d) In a survey, smart phone users are asked whether or not they use a web-based taxi service.



(e) In a survey, smart phone users are asked how many times they used a web-based taxi service over the last year.