A psychologist exa mined vocabulary development in toddlers. To do that, she compared toddlers' language scores. In this study, there were two groups of 15 toddlers each: Group #1 included l-yearolds and Group #2 included 3year-olds. Children Iwere given an age-appropriate language skill test. Scores in the language skill test ranged from [1-40. What is the goal of the study? How many total participants are in the sample? What are the independent 1uariahlels} and dependent yariablels}? What statistical test {1way AN OVA, Dependent samples ttest, Independent samples ttest, 1 sample ttest, 2 test] would he run for this study? why