PLEASE HELP!!

Given that the probability of a chance event is a number between 0 and 1 that expresses the likelihood of the event occurring, choose all that are correct.

0 indicates a certain event
0.25 indicates an unlikely event
0.75 indicates a likely event
1 indicates an impossible event
0.5 indicates equally likely to occur or not occur

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.

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?