The t test is used to compare the means from how many groups?

Most of the deaths attributed to narcotic use are the result of

a. complications arising from the addicts' life-style c. pneumonia b. inadvertent use of large doses of opiates d. sudden loss of opiate tolerance

In newborns, rapid eye movement (REM) sleep is also referred to as _______________ sleep

Fill in the blank(s) with correct word