4.2 Ide ify the parameter, Part II. For each of the following situations, state

Question

4.2 Ide ify the parameter, Part II. For each of the following situations, state whether the paramete 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 (b) A survey reports that local TV news has shown a 17% increase in revenue between 2009 and (e) In a survey, high school and college students are (d) In a survey, smart phone users are asked whether or not they use a web-based taxi service. the budget deficit. 2011 while newspaper revenues decreased by 6.4% during this time period. services on their smart phones. asked whether or not they use geolocation (e) In a survey, smart phone users are asked how many times they used a web-based taxi service over the last year

Explanation / Answer

(a) Since a percentage is mentioned, the parameter of interest is a proportion.

(b) Since the comparison is between percentages, the parameter of interest is a proportion.

(c) The parameter of interest is a proportion (of the number of people who say yes to the total population).

(d) The parameter of interest is a proportion (of the number of people who say yes to the total population).

(e) Since the value is a number, the parameter of interest is a mean.

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