Flight department desired to test effectiveness of their new flight scheduling software. They collected data from twelve months before installation and twelve months after implementation of new software. For easiness of analysis data are illustrated as the mean number of cancellations for each month.
a) Determine the null hypothesis?
b) What test did you use? Describe why?
c) What did you determine?
d) Write up your results by using scientifically recognized form.
Data Set
|
Month
|
2003
|
2004
|
|
1
|
15
|
15
|
|
2
|
22
|
9
|
|
3
|
12
|
9
|
|
4
|
21
|
10
|
|
5
|
9
|
5
|
|
6
|
13
|
10
|
|
7
|
10
|
6
|
|
8
|
24
|
19
|
|
9
|
26
|
7
|
|
10
|
14
|
15
|
|
11
|
23
|
4
|
|
12
|
15
|
3
|