To determine the marginal frequency for students who would most like to visit Hawaii, we need to look at the total number of students who chose Hawaii as their preferred vacation location. According to the survey results shown in the table, the breakdown is as follows:
- Middle school students who chose Hawaii: 38
- High school students who chose Hawaii: 26
The marginal frequency is the total number of students who chose Hawaii, regardless of whether they are middle school or high school students. To find this, we add the number of middle school students who chose Hawaii to the number of high school students who chose Hawaii:
[tex]\[ \text{Total students who chose Hawaii} = 38 + 26 \][/tex]
By doing this calculation, we find:
[tex]\[ 38 + 26 = 64 \][/tex]
Therefore, the marginal frequency for students who would most like to visit Hawaii is:
[tex]\[
\boxed{64}
\][/tex]
