Final - Sample Questions

Procedures/Theory:
  1. Examine these summary statistics. Assuming a positive linear association between the dependent variable (y) and the independent variable (x), and using the summary statistics provided, complete this Analysis of Variance report (i.e. fill in the missing entries).

  2. CSC253 is a popular introductory statistics class which usually attracts students from several departments. A statistics professor is interested in comparing the performance of students from the three departments with largest enrollments. She compiles a list of students who completed the class in the fall quarter and examines the score on the final for a random sample of four students from each of the three departments.

    Examine the SAS output for the data collected from the sample. Conduct a thorough analysis of these data. You must provide a conclusion and state all relevant hypotheses and p-values.

  3. These proc reg model statements resulted in these PRESS scores.
    1. Identify the best PRESS score and state the regression model associated with this score.
    2. Assume that the code fragment was taken from a program that was written to test if sub-population means are equal. The parameters of your regression model are related to these sub-population means in some way. Express these sub-population means in terms of the parameters of your model.
      Note:Make whatever assumptions are necessary.

SAS:

  1. Assume that a dataset (i.e. an internal data structure) has been created with variables X, Y and Z.
    1. Write the SAS code that would need to be added to the DATA step to ensure that variables X, Y and Z are printed with labels "Starting Salary", "Major" and "GPA" respectively.
    2. Write the SAS statement necessary to ensure that "Final - CSC423/324" appears on your output as a title.
    3. Write the code needed to produce the mean and standard deviation for X and Z.
    4. Examine the code fragment. Add code to ensure that a box plot and the p-value for a normality test are produced for variable X.

  2. The program has several syntax errors. Examine the code carefully and identify and correct as many of the syntax errors as possible.