Mathematics, 19.03.2020 17:02 Emiliano15

) A group of 18 people from New York and a group of 15 people from Los Angeles passed the same quiz. The mean grade of group A is 78 points, with the standard deviation σ1=5, the mean grade of group B is 75 points, σ2=4.5. Use α=0.05. Assuming that the subjects are chosen randomly, the cities’ population are independent, and the points are normally distributed:

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) A group of 18 people from New York and a group of 15 people from Los Angeles passed the same quiz....