It is possible for a sample to have a real, non-zero correlation, even though the correlation for the general population is zero

Individuals sampled at the same time working in the same factory is an example of a(n) ________ cohort.

a) inception b) birth c) exposure d) longitudinal

Elizabeth is an infant being tested in Ainsworth's "strange situation." When her mother leaves the room, Elizabeth does not show much response

When her mother returns, Elizabeth continues playing and does not appear to be interested in her mother. According to Ainsworth, this is an example of __________ a) secure attachment. b) disorganized/disoriented attachment. c) resistant attachment. d) avoidant attachment.