Question

A recent headline reads "Early Language Skills Reduce Preschool Tantrums, Study Finds," and the article offers potential explanation of this: "Verbalizing their frustrations may help little ones cope." The article refers to a study that recording the language skill level( by identifying if the language level is below average, average or above average) and the number of tantrums from a sample of preschoolers. (a.) What are the cases? (b.) What is the explanatory variable and the response variable? Indicate if the variable is categorical or quantitative. (c.) Is this a statistical experiment or an observational study? If applicable, determine if it is a randomized comparative or a matched pair experiment. (d.) Based on the study, can we conclude that "Early Learning Language Skills Reduce Preschool Tantrums'? Give reason for your answer. If applicable, provide a possible confounding variable.

          A recent headline reads "Early Language Skills Reduce Preschool
Tantrums, Study Finds," and the article offers potential
explanation of this: "Verbalizing their frustrations may
help little ones cope." The article refers to a study that
recording the language skill level( by identifying if the language
level is below average, average or above average) and the number of
tantrums from a sample of preschoolers. 

(a.) What are the cases?     
(b.)  What is the explanatory variable and the response
variable? Indicate if the variable is categorical
or quantitative.     
(c.) Is this a statistical experiment or an observational
study?  If applicable, determine if it is a
randomized comparative or a matched pair experiment.   
(d.) Based on the study, can we conclude that "Early Learning
Language Skills Reduce Preschool Tantrums'?  Give
reason for your answer. If applicable, provide a possible
confounding variable.

Added by Michael H.

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