Many university libraries keep a copy of the solutions manual (physical or digital) on reserve. You can borrow it for a few hours to check specific problems.
Many students wonder if they can use an 8th edition solutions PDF (which is easier to find for free). Be cautious. The 9th edition reorganized several chapters, changed problem numbering, and added new Bayesian inference sections. Roughly 30% of the problems are new. Relying on the 8th edition will confuse you during grading. Many university libraries keep a copy of the
For many editions, Pearson publishes a condensed Student Solutions Manual containing odd-numbered problems (or selected even-numbered ones). Check ISBN 978-0135189399 for the official student companion. This is often available used for under $20. Be cautious
Simply copying solutions—especially if your professor customizes problem numbers—can lead to an academic dishonesty hearing. Many institutions now use plagiarism detection software that compares student work against known solution manual databases. Relying on the 8th edition will confuse you during grading
The 9th edition is still under active copyright (Pearson Education). Unauthorized distribution violates the Digital Millennium Copyright Act (DMCA). Universities monitor torrent traffic and file-sharing logs, and penalties range from losing course credit to legal action.