Otitis media is commonly referred to as __________

Mildred has to drive across town to help a friend who is experiencing a crisis. It is a time of day when traffic is light, so this should be a fairly simple task. Research into the link between arousal level and task performance suggests that under these circumstances,

a. a fairly low level of arousal should be optimal for this task. b. Mildred's level of arousal will increase as she gets closer to her friend's house. c. a fairly high level of arousal should be optimal for this task. d. a moderate level of arousal should be optimal for this task.

A random sample of n = 9 scores is obtained from a normal population with µ = 40 and ? = 18 . What is the probability that the sample mean will be greater than M= 43?

a. 0.4325 c. 0.1587 b. 0.3085 d. 0.0228