Decide if each distribution of variables is symmetric, skewed, or uniform. Explain

What I think are the answers are in red---let me know if I am correct. Thank you!

1) the cost of a high school student's last haircut

I said symmetric---most students will pay roughly the same amount.

2) the number of points scored by the winning team in the Super Bowl

I said skewed---there are a few games where the scores will be signficiantly higher than normal.

3) how long it took a student run a mile

I said symmetric----the student will take roughly the same amount of time each time.

4) the grades on a particulary hard test

I said skewed----a few outliers doing well, but most people not so well