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.
i assume the line plot is the % difference, the orginal 95% vs 92% has a difference of 3%,
the 10 random values center around 3% and 3% has the most occurances of the 10.
the average value for the 10 is 2.9%, so that is within .1 of the orginal 3%
so it should be significant, not sure what criteria you are supposed to use?
is there a p or z test involved?