4. A Pew Research Center survey asked a random sample of US adults about what ch

Question

4. A Pew Research Center survey asked a random sample of US adults about what channel they regularly watch for news and their political party identification. For one analysis they focused on those who regularly watch Fox News Channel, CNN, MSNBC, or nightly network news. Here are the political profiles (in percents) for each of these news sources Part Republican Democrat Independent Other/Don't know 6 Fox 39 CNN MSNBC Network 45 27 10 45 26 23 What are the observational units for this study? Select one A. Those who watch the news B. US adults C. Republicans D. Democrats a. b. [2 pts] Identify the two variables measured and, for each, whether the variable is categorical or quantitative What type of plot should be use to display these data? Select one A. Segmented bar graph B. Scatterplot C. Stacked histograms D. Side-by-side boxplots c. d. Can we use these data to generalize to all US adults? Explain. e. Are the values in the table considered statistics or parameters? Explain your choice

Explanation / Answer

(a)

Correct option:

B. US Adults

(b)

Variables measured :

(i) Channel regularly watch: Fox, CNN, MSNBC & Network : Categorical Variable

(ii) Political party affiliation : Republican, Democrat, Independent & Other/Don't know: Categorical Variable

(c) Correct option:

A.    Segmented bar graph

(d) Since it is a random sample of US adults, we can use these data to generalize to all US adults.

(e) The values in the table are considered statistics. They are not parameters. EXPLANATION: They are the characteristics of sample.

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