social media posts\nwhat was the median number of posts made?

Explanation:

Step1: Calculate total number of students

Sum up the frequencies: $5 + 2+1 + 2+2+2+2+1+4+6=27$.

Step2: Determine position of median

Since $n = 27$ (odd - numbered data set), the median is at the $\frac{n + 1}{2}=\frac{27+1}{2}=14$th position.

Step3: Find the median

Count the frequencies in ascending - order of the number of posts: For $0$ posts, there are $5$ students. For $1$ post, there are $2$ students. For $2$ posts, there is $1$ student. For $3$ posts, there are $2$ students. For $4$ posts, there are $2$ students. For $5$ posts, there are $2$ students. For $6$ posts, there are $2$ students. For $7$ posts, there is $1$ student. Adding up the frequencies: $5+2 + 1+2+2+2+2=16$. The $14$th value falls within the group corresponding to $4$ posts.

Answer:

$4$