Assignment:
Prior to taking an aerobics class, each of 12 healthclub members is asked to rate the instructor on a scale in which 3 = “excellent,” 2 = “good,” and 1 = “poor.” Following the class, each student is again asked to rate the instructor. Given the following before-and-after ratings, use the 0.05 level in determining whether there has been a significant improvement in the ratings received by the instructor.
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Student
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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Precourse
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1
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3
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2
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2
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2
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2
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1
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3
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1
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2
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2
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1
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Rating
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Postcourse
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2
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2
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3
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3
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3
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2
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3
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3
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3
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2
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3
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2
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Rating
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Provide complete and step by step solution for the question and show calculations and use formulas.