Answer:
Step-by-step explanation:
Basically those lines next to the problem are absolute value signs. Get rid of those then your problem is solved.
Answer:

Step-by-step explanation:
Although the way you wrote problem, this is not what it looks like, I think this is what you meant.






Answer:
b. exam completion time is negatively skewed
Step-by-step explanation:
A data distribution is said to be negatively skewed when <em>median</em> value of the distribution is higher than the <em>average</em> value of the distribution.
In this example
- average mid-term completion time is 40 minutes
- median mid-term completion time is 55 minutes.
thus median > mean, so the mid-term completion time is negatively skewed. Negatively skewed distributions are also called left-skewed.
The answer is negative twenty five. By the way, if that is you in the picture, you are beautiful.