Q21. A study was conducted to determine whether there was a difference in life satisfaction for graduates who had children or not. The data in DATA SET E provide Life Satisfaction Scale scores (out of 25) for study participants, who were randomly selected from the population of interest. Is there evidence of a difference in life satisfaction? Show your work for full marks. (8 marks) DATA SET E Children No Children 13 17 10 15 21 20 20 16 24 15 11 15 20 17 11 19 5 16 17 15 19 16 7 10 12 17