There is a strong relationship between eating ______ and low rates of bipolar disorder

A researcher is studying the amount of sleep college students get each night. She notices that there is a lot of variability in the data,

with some students typically sleeping for around eight hours a night and some sleeping around five hours a night. One way to measure how spread out the data scores are is to use ________ a. the arithmetic mean. b. meta-analysis. c. inferential statistics. d. the standard deviation.

Martha and Jim spend time with their baby, teaching her to say what she wants and to tell her parents what she needs. This style of speech is called

a) expressive. b) underextension. c) overextension. d) referential.