Does a new test of knowledge of a computer language (measured by the KLOTZ test) relate to the number of years that a learner has spent learning the language? To answer this question, a researcher collects KLOTZ and YEARS data for a large number of learners and lists the results side by side for a Pearson r statistic. 

Use the ASCII data in  "j:\ling\msdos\otherdata\corstudy1.txt" for a complete study list.

Data file:  corstudy1.sav
Variables: KLOTZ, YEARS

LEARNER ID     KLOTZ      YEARS
1                 99       9.47
2                 99       8.6
3                 99      19.33
4                 99      16.33
5                 99       8.5
6                 99       9.4
7                 99      17.67

(data continue)
  

 Answer the following questions:

1. The researcher wants to run a Pearson r statistic on these data. Do the data meet the required assumptions of the Pearson r? Explain in full.
    
    
    
    
    
2. What is the independent variable? What is the dependent variable?
    
    
3. Is this problem one-tailed or two-tailed? Explain.
    
    
4. If permissible, calculate the Pearson r and write the result below.
    
    
    
    
5. Is this result significant; and, if so, what is the probability that it occurred by accident?
    
    
6. If a learner were to study for 2.87 years what would be the estimated score on the KLOTZ test? Fully explain your estimate.
    
    
    
    
    
7. The match-up between KLOTZ and MONTHS accounts for how much of the data's variability?