With regard to sound, a pure tone consists of several sub-waves with different frequencies

Which one of these tend to overestimate true population parameter p?

a. Cohen's D b. r c. Omega-squared d. r2

Infants develop an attachment secure base between the ages of seven and nine months. This interval is called the

a. asocial phase. b. phase of indiscriminate attachments. c. specific attachment phase. d. phase of multiple attachments.