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 personally 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 thier smart phones.
d. In a survey, smart phone users are asked whether or not they used a web-based taxi serivce.
e. In a survey, smart phone users are asked how many times they used a web-based taxi service over the last year.