NEED ASAP At a large university, 20% of a random sample of male students have an overall grade point
average (GPA) of 3.5 or higher. A random sample of female student records found that
25% had a GPA of 3.5 or higher. The president of the university wants to determine
whether there is evidence of a difference in grades between males and females. What
would she write as the null and alternative hypotheses for this situation?

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?