Assuming the population variances are unknown and equal, you wish to test whether the Group 1 population mean is equal to the Group 2 population mean. The resulting test statistic is a Student-t with how many degrees of freedom

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If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.