4 The designer of an SAT prep course wants to test whether persons who take the course increase their SAT scores, on average. To do so, the founder selects a random sample of course takers and...

4 The designer of an SAT prep course wants to test whether persons who take the course increase their SAT scores, on average.  To do so, the founder selects a random sample of course takers and compares their SAT scores from before taking the course to their SAT scores after taking the course. Which situation below would represent a Type Il Error for the associated test of hypotheses?

a.Concluding the course is not useful on average, when the course is not useful on average

b.Concluding the course is not useful on average, when the course is useful on average

c.Concluding the course is useful on average, when the course is not useful on average

d.Concluding the course is useful on average, when the course is useful on average