The orange curve shows computed course averages (35% Homeworks 1–9 and GPS 1–9 + 65% Midterms 1–2) for all students who took both midterms, in sorted order. These averages were used to define the vertical letter-grade boundaries. The blue dots show the sum of both midterm scores for the corresponding students. Dots further above the orange curve indicate lower homework averages.
Assuming a HW+GPS average of 87% (the class median assuming no drops), a total midterm score of at least 84 is consistent with an A, a total midterm score between 60 and 83 is consistent with a B, and a total midterm score between 38 and 53 is consistent with a C.
Please keep in mind that this is an extremely rough prediction of your final course grades, based on roughly 65% of the overall work. In particular, these estimates were computed without dropping any homework or GPS scores and without incorporating survey extra credit, so they should be considered conservative. Past experience suggests that most students‘ final course grades will be within half a letter grade of these estimates, but differences of a full letter grade (in either direction) are common every semester.
Here is a scatterplot showing Midterm 1 scores versus Midterm 2 scores: