On a normal curve, 95 percent of all the cases would be found between which two standard deviations (SDs)?

Major organs and body systems are formed during this period of prenatal development

a. germinal c. fetal b. placenta d. embryonic

Laurie hypothesizes that women will be more likely than men to hold a door open for others. She decides to watch people coming in and out of a local coffee shop, recording the sex of each individual who holds the door open for another person

Laurie is conducting what type of research? a. Experimental research b. Naturalistic observation c. Archival research d. Correlational research