What type of data assists in the study of population demography?
a. statistical data
b. scientific data
c. qualitative data
d. systematic data

Statistical data.

Explanation:

statistical data is the , the data acquired from the rigorous scientific exercise of ,

Data collection

Data intepretation

Data analysis

Data  validation.

Through this process, data is acquired on random sampling , collection of material like fossils and many other procedures.

The data is later analysed and interpreated , where many activities may be involved , such as physical obsevations and even labolatory experiments.

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 !

1.new zealand has a large temperate climate while for north has subtropical weather during summer.

i can only answer one