Chi-Square Test Steps? Is there a Practical difference?

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A stock broker randomly assigned 20 of her new team to either a class she taught statistical skills for 6 weeks or a class where she taught art skills for six weeks. At three months, correct decisions for the art group were: 22, 20, 20, 22, 23, 24, 23, 23, 24, 22. The statistics groups correct decisions were: 23, 23, 23, 24, 23, 25, 23, 23, 25, 25. Is there a difference? Show evidence of all 10 steps. Is there a practical difference?

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9 Practicality: