A researcher interested in vocabulary development obtains a sample of twenty 3-year old children to participate in a research study. The average (i.e., mean) score for the group of 20 is an example of a(n). a) sample
b) statistic
c) population
d) parameter

b) statistic

Step-by-step explanation:

Population = A large groups of individuals sharing the same or similar characteristic by the point og study.Sample  = It is a subset of population .Parameter = It is measure of characteristic in population.Statistic =  It is measure of characteristic in sample.

Since the average score was taken by the group of 20 which is nothing but the sample.

That means, the average score is an example of statistic.

Hence, the correct option is b) statistic .

x=67

Step-by-step explanation: