The ability to categorize speech sounds is found in infants as young as _____ month(s) old.
A) one
B) three
C) six
D) ten
Question 2
A sampling technique in which a population for which there is no sampling frame and is divided into a set of smaller groups for which there are known sampling frames is known as
a. stratified sampling.
b. snowball sampling.
c. cluster sampling.
d. convenience sampling.