A random sample of 197 students was asked how many songs were in their digital music library and what fraction of them was legally purchased. Overall, they reported having a total of 108,621 songs, of which 25.8% were legal. A research group found that a 90% confidence interval for the fraction of songs in students' digital music libraries that are legal is (25.6%,26.0%). The research group that conducted this survey wants toprovide the music industry with definitive information, but they believe that they could use a smaller sample next time. If the group is willing to have four times as big a margin of error, how many songs must be included?A total ofsongs must be included.(Type a whole number.)

* SOLUTION :- from the given information the answer is provided as below ,

Answered: Arandom sample of 197 students was…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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