Are the number of errors on the third-person singular "s" in the L2 English of beginning-level learners a factor of age and/or IQ? To answer this question, a researcher gathers data (using obligatory-occasion methodology) on the number of errors that occurred in the first five journal entries of 23 learners and administers the Peabody IQ test to each learner. The researcher gathers information on each learner's age (in years and months), recorded as decimal figure. The researcher performs an ANOVA to determine which of the two independent variables determine the dependent variable.

Create an SPSS data file for this study and save the data file to your a: drive.

Data file: dfstudy2.sav
Variables: ER, PIQ, AGE

ER     AGE    PIQ
24      14.2     97
12      18.2    100
72      17.0    101
43      18.6     99
19      19.5     85
34      18.0    101
56      17.9    103
11      16.2    110
103     18.1    102
71      16.9     93
48      18.2     91
32      17.8     89
81      18.3    109
31      15.8     92
36      18.2     97
41      15.9     99
51      18.4     82
63      20.1    101
9       20.5     92
59      19.1     93
80      17.0     89
19      19.1     88
49      16.8    101
 

Answer the following question:

1. What kind of data are in each of the three variables (nominal, ordinal, or interval)?