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1. There are 20 students in my QBA class. Use the following information to find mean and variance of the selected sample. GPA # of

1. There are 20 students in my QBA class. Use the following information to find mean and variance of the selected sample. GPA # of students 3.0-3.4 1 3.4-3.8 2 3.8-4.0 3

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