Oberlin Group Library Statistics

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Presentation given at the Oberlin Group Library Directors Meeting, October 1, 2010

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  • 66 variables that I could use – I added two more, year of survey and US News rank in 2009. Not all variables reported for each school each year.
  • Here’s a great correlation, with few outliers.
  • Example of a two highly correlated measures, as we would expect
  • This one is more concerning, because each of the 11 dots starting to separate themselves in 2008-09 are different schools.
  • Here’s an example of tight clustering, but with some concerns
  • Here’s a great example of a variable we clearly didn’t understand.
  • Shows slower adoption of ejournals – the rank order correlation from the previous year and following year is good, but two years later, it’s poor.
  • Oberlin Group Library Statistics

    1. 1. Claremont Colleges Library<br />Oberlin Group Statistics<br />John McDonald<br />Claremont Colleges Library<br />
    2. 2. Claremont Colleges Library<br />What and why<br /><ul><li>Check validity of the measures
    3. 3. Are we all measuring the same thing?
    4. 4. Test the reliability of the variables
    5. 5. Are we all measuring consistently from year to year?</li></ul>In order to:<br /><ul><li>Refine our measures collecting process
    6. 6. Provide stronger definitions of measures</li></li></ul><li>Claremont Colleges Library<br />Oberlin Group Data<br /><ul><li>6 years of statistics
    7. 7. From 2004 through 2009
    8. 8. All 80 schools represented, though not all years for all schools
    9. 9. 66 relatively consistent variables collected</li></li></ul><li>Claremont Colleges Library<br />Transform data<br /><ul><li>Transposed Excel spreadsheet
    10. 10. Import into database
    11. 11. Add year variable
    12. 12. Add US News Ranking for 2009
    13. 13. Export to STATA
    14. 14. Run analysis</li></li></ul><li>Claremont Colleges Library<br />
    15. 15. Claremont Colleges Library<br />Statistics<br /><ul><li>Look for Outliers
    16. 16. Test Rank order correlation
    17. 17. Build regression model</li></li></ul><li>Claremont Colleges Library<br />Claremont Colleges<br />
    18. 18. Claremont Colleges Library<br />Atlanta University Center<br />Claremont Colleges<br />
    19. 19. Claremont Colleges Library<br />Group Transactions (Attendance)<br />Group Transactions<br />
    20. 20. Claremont Colleges Library<br />Faculty FTE<br />Undergraduate FTE<br />
    21. 21. Claremont Colleges Library<br />
    22. 22. Claremont Colleges Library<br />Smith College<br />Circulation (Faculty)<br />Simmons<br />Faculty FTE<br />
    23. 23. Claremont Colleges Library<br />How many electronic subscriptions do you receive?<br />Total Library Expenditures<br />
    24. 24. Claremont Colleges Library<br />Rank Order Correlation of Undergraduate FTE<br />
    25. 25. Claremont Colleges Library<br />Rank Order Correlation of Total Ejournals<br />
    26. 26. Claremont Colleges Library<br />Does high group attendance impact reference transactions? [YES] - R-squared = 0.2709 - Group Trans = t= 5.92 P>|t| = 0.000 - Librarian FTE = t= 3.21 P>|t| = 0.000 Or impact circulation (students)? [NO] - R-squared = 0.4145 - Total Volumes = t= 14.42 P>|t| = 0.000 - Undergrad FTE = t= 5.16P>|t| = 0.000 - Total Volume = t=11.47 P>|t| = 0.000 <br />
    27. 27. Claremont Colleges Library<br />Does high gate count result in high circ? - R-squared = 0.2663, - Gate Count = t=8.74 P>|t| = 0.000 - Undergrad FTE = t=3.62 P>|t| = 0.000 Does circ depend on volume count? - R-squared = 0.4539 - Gate Count = t= 6.39 P>|t| = 0.000 - Undergrad FTE = t= 2.16 P>|t| = 0.031 - Total Volume = t=11.47 P>|t| = 0.000 <br />
    28. 28. Claremont Colleges Library<br />Just for fun!Predicting US News & World Report rankings<br />
    29. 29. Claremont Colleges Library<br />
    30. 30. Claremont Colleges Library<br />
    31. 31. Claremont Colleges Library<br />Looking at just library-specific dataTotal Library Expenditures Professional Staff Salaries Total Collection Volume Count Total Books & Bound Volumes Added Books added by purchase Total journals Print journals EjournalsILL returnables borrowed for you ILL nonreturnables provided to you Circulation (Student)circulation (Faculty)Reference transactions (typical week)Group Transactions Group Transactions (Total attendance)Gate count (Typical week)<br />
    32. 32. Claremont Colleges Library<br />
    33. 33. Claremont Colleges Library<br />What affects our student’s view of us?How much you spend.How much you have.How much you can get.How much you don’t help them.<br />

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