Problem 1 Stat > Tables > Expected Grade, check percentages.
Answer 34.1%
Problem 2 Stat > Basic Statistics > Display Descriptive Statistics, Variable= GPA
Answer: 3.2
Stat > Basic Statistics > Display Descriptive Statistics, Variable=GPA , By variables= Course
3015: 3.07
3101: 3.28
Problem 3 Question 5. The answers indicate that some students understood "hours per class" and others understood "hours in total" (which is what I meant). Now the answers are useless.
Problem 4 Graph > Scatterplot, Simple > Y variables= Difficulty, X variables=GPA, ok
click on title, right-click, select Edit title, make changes
click on symbol, right-click, select Edit Symbols, select Custom, change to diamonds, color black and size=2
click on symbol in lower left corner, right-click twice, select Edit Symbols, select Custom, change to open circle
Click below point, click on text symbol, add text