In the context of sources of data, commercial sources, trade associations, management groups, and state and local governments are examples of data.

Primary data.

Explanation:

Primary data is data which is collected by researcher through first hand sources i.e. original from methods like experiments, or surveys, whereas, secondary data is the already collected data in the past by someone else. For example, suppose if a food company wants to enter into Indian food market of already existing food items then it will resort to already collected data through reports and articles whereas, if it wants to come up with new food item in the market then it will go for primary collection of data to know the preference of consumers over it's new food item.

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 !