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.
So I know that the line plot shows that it has a sample size of 10 because when I add up all the 'x''s I get 10 and I don't understand how to figure out if it has a significant difference between the two means based of the line plot and how to explain that.
I Appreciate the help! Thank You!
So, our current evidence that supports a difference exists between the first group and the second group is the difference in means being 3. So, looking at a line plot of random simulations, we want 3 to be an unlikely result, thereby showing that the difference in means did not happen by random chance. However, we do not see that in this case. 7/10 of the random simulations resulted in a difference between means in the two groups of or greater than three, so therefore the difference in the means of the two groups is not significant.