Which composer is referred to as the father of the symphony

It's not for nothing that Franz Joseph Haydn is known as the Father of the Symphony – he wrote over 100 of them! This week on Classics for Kids, symphonies by this prolific composer. Other Music Used within the Program (all by Haydn)

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

the answer would be in this answer. someone already asked the question.