A researcher is examining motor skill development by observing children at 18 months old,24 months old,and 30 months old.If the researcher uses a cross-sectional design and obtains 20 scores for each age,how many children participated in the entire study?
A)20
B)40
C)60
D)cannot determine without more information.

Question

Quizplus · Accepted Answer

Since 20 scores were obtained at each age, and the study examined children at three different ages, the total number of children in the study is calculated by multiplying each age group by the number of scores obtained (20), resulting in a total of 60 children.

A Researcher Is Examining Motor Skill Development by Observing Children