What do you mean by general vocational skill? ​

they are the skills that are needed by people for a particular job.

Explanation:

Vocational skills are practical or firsthand skills that help a person master a trade or a job. These skills may be obtained on the job or at a vocational school. A vocational school provides technical education to prepare people for work in a trade, craft, or profession.

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !