A humanities professor is interesting in learning whether there is a positive association between average online homework scores and the final class average in an online humanities course. The computer output below shows the results from a regression model in which the final class average was predicted by the average online homework score. Assume that the conditions of the linear regression model are satisfied.
Choose the correct null and alternative hypothesis to test whether there is an association between final class average and average online homework scores.
◦ H
0: The correlation is positive.
H
a: The correlation is zero.
◦ H
0: There is a linear association between the final class average and the average online homework score.
H
a: There is no linear association between the final class average and the average online homework score.
◦ H
0: There is no linear association between the final class average and the average online homework score.
H
a: There is a positive linear association between the final class average and the average online homework score.
◦ None of these.
Positive Babinski’s sign.
Slow-Wave Sleep and Learning
Lecture hall and professor
(B) Interneurons or association neurons.
The “inside positive” rule
Control of Homeostasis: Positive Feedback