Simplify 8/-4 ÷ -3/9 . (5 points) Question 10 options: 1) 6 2) -6 3) 12 4) -12

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.