Mitch has just found out that he will have three tests on the same day. His heart is racing, and he is experiencing a shortness of breath and feels a little sick to his stomach. Mitch is exhibiting signs of which stage of the general adaptation syndrome?

The physical and biological changes of puberty result from changes that occur in the

a. endocrine system. b. lymphatic system. c. nervous system. d. thyroid gland.

In a normal distribution, what proportion of scores fall within the interval between the

first standard deviation below the mean to the second standard deviation below the mean? a. .6826 b. .3413 c. .8413 d. .1359