On the graph at left, row 1 shows the discriminant (D) for the quadratic function.
Right now D=12.
On the next screen, you'll be able to change a, b, and
c. Before you do, make a prediction.
Which of these values can you change to make D
larger? How can you change that value?

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected