Reading Habits In 2016 the Pew Research Center asked a sample of American adults which of the following they had done in the previous 12 months: read a book in any format, read a print book, read an e-book, and listened to an audio book. The percentages of who had engaged in each of these activities is shown in the table. Suppose Pew Research Center did another survey polling 1200 people and the percentages were the same as those in 2016. a. How many would have read a book in any format? b. How many would have read an e-book? c. Are the events listed in the table mutually exclusive? Why or why not?
Reading Habits In 2016 the Pew Research Center asked a sample of American adults which of the following they had done in the previous 12 months: read a book in any format, read a print book, read an e-book, and listened to an audio book. The percentages of who had engaged in each of these activities is shown in the table. Suppose Pew Research Center did another survey polling 1200 people and the percentages were the same as those in 2016. a. How many would have read a book in any format? b. How many would have read an e-book? c. Are the events listed in the table mutually exclusive? Why or why not?
Solution Summary: The author explains that the reading habits of U.S. adults are categorized into four categories, one of which includes reading a book in print and e-book formats.
Reading Habits In 2016 the Pew Research Center asked a sample of American adults which of the following they had done in the previous 12 months: read a book in any format, read a print book, read an e-book, and listened to an audio book. The percentages of who had engaged in each of these activities is shown in the table.
Suppose Pew Research Center did another survey polling 1200 people and the percentages were the same as those in 2016.
a. How many would have read a book in any format?
b. How many would have read an e-book?
c. Are the events listed in the table mutually exclusive? Why or why not?
During busy political seasons, many opinion polls are conducted. In apresidential race, how do you think the participants in polls are generally selected?Discuss any issues regarding simple random, stratified, systematic, cluster, andconvenience sampling in these polls. What about other types of polls, besides political?
Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks
28. (a) Under what conditions do we say that two random variables X and Y are
independent?
(b) Demonstrate that if X and Y are independent, then it follows that E(XY) =
E(X)E(Y);
(e) Show by a counter example that the converse of (ii) is not necessarily true.
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