ASSIGNMENT 4.Descriptive Statistics

N Minimum Maximum Sum Mean Std. Deviation

Intro 365 0 1 144 .39 .489

DataMining 365 0 1 65 .18 .383

Survey 365 0 1 68 .19 .390

CatData 365 0 1 76 .21 .407

Regression 365 0 1 76 .21 .407

Forecast 365 0 1 51 .14 .347

DOE 365 0 1 63 .17 .378

SW 365 0 1 81 .22 .416

Valid N (listwise) 365

1. From the table the sum column, it can be concluded that Introduction course is the course mostly taken by the customers, there are 144 customers participating in this course.

2. After using the Select Case to select cases which the condition of Intro=1. The following table is obtained. It can be seen that SW is the course mostly taken with the Introduction course. There are 35 people taking both Introduction and SW course

Descriptive Statistics

N Sum

Intro 144 144

DataMining 144 20

Survey 144 22

CatData 144 26

Regression 144 26

Forecast 144 19

DOE 144 17

SW 144 35

Valid N (listwise) 144

3. Confidence=noof people participating∈both Intro∧SW

noof people participating∈Intro= 35144

=0.24

4. Benchmark confidence=noof people participating∈the SW

totalnumber of customers= 81365

=0.22

Number of people taking in SW can be obtained from the table in question 1 (sum column)

Lift ratio=0.240.22

=1.09525 ≈1

5. Basing on the lift ratio of 1.09525 is slightly higher than 1, suggesting that the association is rule is not effective because although there is some degree of association between the Introduction and SW course, the relation is not much higher than would be expected if the two are independent.