For each of the following situations, state whether the parameter of interest is
ID: 3240549 • Letter: F
Question
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.
Explanation / Answer
Solution:
(a).It is a Proportion, because worry or not worry is categorical.
(b) It is a mean, because we are interested in revenue and here revenue increase or decrease over time.
(c) It is a Proportion, because yes or no is categorical Variable So we use Proportion.
(d) It is a Proportion, because yes or no is categorical Variable So we use Proportion.
(e) It is a Mean, because it is a number over time.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.