A professor wants to know whether there is difference in time it takes to complete the Graduate Capstone Project between students who take 605 before completing 15 graduate credit hours and students who take 605 after completing at least 15 credit hours.
Data Set
Time to complete GCP reported in terms
< 15 credit hours

15+ credits hours

2

1

2

1

3

1

1

1

1

1

1

1

2

1

2

1

2

1

2

1

3

2

4

1

2

1

2

1

2

1

2

1

2

1

2

1

2

2

2

1

a. Determine the null hypothesis?
b. What kind of statistical test best did you use?
c. What are the results? Are they significant? (Provide the statistic and probability.)