HELP PLEASE! I need to find the values of X and round the answer to the nearest tenth.

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.

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

Ineed to know the answer to this algebra question.