Sharing music online (5.2, 5.3). A sample survey reports that 29% of Internet users download music files online, 21% share music files from their computers, and 12% both download and share music. Make a two-way table that displays this information.

tabita57i 2020-10-27 Answered
Sharing music online (5.2, 5.3). A sample survey reports that 29% of Internet users download music files online, 21% share music files from their computers, and 12% both download and share music. Make a two-way table that displays this information.
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Nathalie Redfern
Answered 2020-10-28 Author has 99 answers
We are interested in the proportion of Internet users that download music files online and that share music files from their computers.
Let us name the columns of the two-way table "download online” and "do not download online”, while we name the rows of the two-way table "share music files” and "do not share music files”.
 Download online  Do not download online  Total  Share music files  Do not share music files  Total 
29% of the Internet users download music files online, while 21% share music. files and 12% do both. We also know that the table needs to contain 100% of the Internet users in total.
The remaining percentages can be determined using the known row/column totals.
 Download online  Do not download online  Total  Share music files 12%21%12%=9%21% Do not share music files 29%12%=17%71%9%=62%100%21%=79% Total 29%100%29%=71%100%
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