Question

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.

Answer 1

i assume the line plot is the % difference, the original 95% vs 92% has a difference of 3%,

the 10 random values center around 3% and 3% has the most occurrences of the 10.

the average value for the 10 is 2.9%, so that is within .1 of the original 3%

so it should be significant, not sure what criteria you are supposed to use?

is there a p or z test involved?

Hope this helps!