For a fixed number of subjects when conducting an independent samples t-test, power is greater with equal sample sizes than with unequal sample sizes, ceteris paribus.

Kari states that she is "in a bad place" in her head. She feels down, has little appetite, and has noticed some weight loss

Lately, she is not interested in any of her usual activities because they leave her feeling empty and are just "too much effort." She is indifferent to friends and family and has begun having recurrent thoughts of suicide. Kari is best described as suffering from A) dysthymic disorder. B) cyclothymic disorder. C) major depressive disorder. D) bipolar disorder.

How did the researchers indicate that the behaviors were actually novel, and not

simply due to the expectations of the experimenters? A) they used a control group B) they used a variety of porpoises who emitted similar behaviors C) they made sketches of the normal behaviors D) they used judges and then assessed inter observer reliability