If the null hypothesis is true, what value is expected on average for the repeated-measures t statistic?

You are watching a sleeping person and notice that her eyes are darting about under the eyelids. What prediction would you make?

a) She is dreaming. b) She has just fallen asleep. c) She is in a deep sleep stage. d) She has taken a sedative in order to fall asleep.

Which of the following is NOT an explanation as to why a newborn's body lacks easy mobility?

a) the baby's head is disproportionately larger than its body b) babies cannot get enough nourishment to increase their strength c) the baby's limbs are relatively short in relation to the rest of the body d) babies' bodies are mostly fat, not muscle, so they lack the strength to pick their head up