Most of the focusing is done at the front of the eye by the cornea, with additional, smaller adjustments being made by the

Rats primed with estradiol followed by progesterone injections show

a. increased activity in single neurons in the VMH during lordosis. b. suppression of female sexual behavior. c. impaired thermoregulation during parturition and lactation. d. more and larger cells in the sexually dimorphic nucleus. e. increased activity in single neurons in the medial preoptic area during lordosis.

An experimenter hypothesizes that biology majors score higher than literature majors on an intelligence test. If the mean score for biology majors was 18.8 and the mean score for literature majors was 21.3, and the Sdifference was 0.9, the t score was

A) t = (18.8 – 21.3) / 0.92 = –3.09 B) t = (18.8 – 21.3) / 0.9 = –2.78 C) t = (18.8 – 21.3) (0.9) = –2.25 D) t = (18.8 – 21.3) / [(2) (0.9)] = –1.39