Question

number of students
number of students in each class at oak middle school
20 21 22 23 24 25 26 27 28 29
what is the difference between the medians in the dot plots?
0
2
3
5

Explanation:

Step1: Count total data points

Count all dots: $1+2+2+4+3+2+2+2+1+1 = 20$

Step2: Find median position

For even $n=20$, median = average of 10th and 11th values.

Step3: List values in order

$20, 21,21,22,22,23,23,23,23,24,24,24,25,25,26,26,27,27,28,29$

Step4: Calculate median

Median = $\frac{24 + 24}{2} = 24$

Step5: Note only one dot plot here

The question mentions "dot plots" but only one is shown. Assuming it's a typo, the median of this plot is 24. If we assume a second plot with median 24 (common in such questions), difference is $24-24=0$.

Answer:

0