I'm very confused ? a (6,5),b (8,-2),c (-4,-2),d (-2,5)

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

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What term makes it inconsistent y=2x - 4