The document discusses using a spreadsheet to analyze data on students' weekly activities. It compares using spreadsheets versus databases for storing and manipulating data. While spreadsheets work well for small, simple data, databases are better for large, complex, relational data as they prevent data redundancy and inconsistencies. The document also uses the student activity data to analyze a hypothesis about how work hours impact students, finding mixed results that don't fully support the hypothesis.

4. In Percentage Week 1 Week 2 Weekly Duration Weekly Duration Andrew Harry Samuel Andrew Harry Samuel Education 20% 53% 27% Education 14% 51% 35% Exercise 67% 33% 0% Exercise 22% 78% 0% Housework 55% 0% 45% Housework 44% 0% 56% Recreation 33% 22% 45% Recreation 32% 25% 42% Religion 0% 100% 0% Religion 0% 100% 0% Rest 30% 31% 39% Rest 29% 32% 39% Socialising 29% 50% 21% Socialising 53% 32% 15% Travel 25% 41% 34% Travel 23% 41% 36% Work 81% 0% 19% Work 70% 0% 30%

13. Spreadsheet constraints example Numbers Text Date Currency 1.00 Where 19/09/2009 $13.00 5423.00 Is 19/09/2009 $56.00 234.00 My 19/09/2009 $47.00 52.00 Cow 19/09/2009 $85.00 76.00 ? 19/09/2009 $99.00 Each Column is formatted to display the specified information only

15. Reports example This report based the this query

16. Calculations Example Num A Num B Total 20 2 22 10 6 16 5 5 10 7 3 10 9 8 17 Num A + Num B = Total

28. Working vs Non-working students