2009 Biostat 510 Homework Assignments and the accompanying data sets can be found here:

Homework 1 Due Tuesday, January 20th. The Excel files for homework one can be found below:

  • homework1_2009.doc This homework assignment asks you to import the Excel files from each group, and combine them to make a single data set. You also get some simple descriptive statistics and graphs.
  • homework1_key_for_web_2009.doc The key for homework 1.

  • Group1.xls
  • Group2.xlsx
  • Group3.xls
  • Group4.xls
  • Group5.xls
  • Group6.xls
  • Group7.xls
  • Group8.xls
  • Group9.xls
  • Group10.xls

    • Homework 2 Due Thursday, January 29th. The Excel file for homework two can be found below:

  • homework2_2009.doc This homework assignment asks you to import the Excel file containing birthdate information, merge it with the b510.allgroups dataset from homework 1, create some new variables, and carry out some t-tests.
  • homework2_key_for_web_2009.doc This is the key for homework 2.

  • Birthdate.xls
  • allgroups.sas7bdat This is the SAS dataset from homework 1, so you can combine it with the birthdate data from this homework.

    • Homework 3 Due Thursday, February 12th.

  • homework3_2009.doc This homework assignment asks you to carry out some independent samples t-tests, paired-samples t-tests, and one-sample t-tests. You also carry out a simple linear regression with a continuous X predictor, and a dummy variable regression.
  • homework3_key_for_web_2009.doc This homework assignment asks you to carry out some independent samples t-tests, paired-samples t-tests, and one-sample t-tests. You also carry out a simple linear regression with a continuous X predictor, and a dummy variable regression.

  • allcases.sas7bdat SAS dataset created for homework 2, and used as the dataset for homework 3.

    • Homework 4 Due Thursday, March 5th.

  • homework4_2009.doc This homework assignment asks you to produce a correlation matrix, scatterplot matrix, fit simple linear regression modelss, multiple linear regression models, and a oneway ANOVA model.
  • homework4_key_2009_for_web.doc Key for Homework 4.
  • Residual_plots_explanation.doc This is an excerpt from an email sent to explain a bit about the residuals that are created for a regression model.

  • AFIFI.DAT raw data file to read in for homework 4.

    • Homework 5 Due Tuesday, March 17th.

  • homework5_2009.doc This homework assignment asks you to create some cross-tabs for independent data, and also for paired data, and to fit some logistic regression models, using both categorical and continuous predictors.
  • homework5_key_for_web_2009.doc
  • afifi.sas7bdat SAS data set to use for homework 5.

    • Homework 6 Due Thursday, March 26th. The Excel files for homework six can be found below:

  • Homework6_2009.doc This homework assignment asks you to import the Excel files below, and merge them to create one stacked dataset. Then, you are asked to get some descriptive statistics, create some graphs, and carry out independent samples t-tests, paired t-test and a one-sample t-test.
  • Homework6_key_for_web_2009.doc This is the key for homework 6.

  • Group1.xls
  • Group2.xls
  • Group3.xls
  • Group4.xls
  • Group5.xls
  • Group6.xls
  • Group7.xls
  • Group8.xls
  • Group9.xls
  • Group10.xls

    • Homework 7 Due Thursday, April 2nd, 2009.

  • homework7_2009.doc This homework asks you to read in raw data, create some new variables, and fit a simple linear regression model, a multiple linear regression model, and a oneway ANOVA model.
  • homework7_key_for_web2009.doc This is the key for homework 7.
  • AFIFI.DAT The raw data file to read in for homework 7.

    • Homework 8 Due Thursday, April 9th, 2009.

  • homework8_2009.doc This homework assignment asks you to produce cross-tabulations, and carry out chi-square tests of independence for unmatched data. You are also asked to fit several logistic regression models with continuous and categorical predictors. There is also a problem where you are asked to compare the proportions for matched data, using McNemar's test of symmetry.
  • homework8_key_for_web_2009.doc The key for homework 8.
  • afifi.sav SPSS data file to use for homework 8. To get the data into SPSS, go to File...Open...Data. You may use your own version of this dataset for the homework, if you wish.