Review the graph of function f(x). Which statement describes lim f(x)?
Ay
10+
O The limit lim f(x) = a because lim f(x) = 2 and lim f(x) = 0
x
1
x
8+
6+
The limit lim f(x) = because lim f(x) = -~ and lim f(x) =
1
x-1
d
4+
2+
The limit lim f(x) does not exist because lim f(x) = and lim f(x) =0
X
*
o
2
3
5
- 2 +
The limit lim f(x) does not exist because lim f(x) -- and lim f(x) =
1
4+
6+
-8+
-10+

How do i do this? i don’t understand

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Standard deviation of 19,29,21,22,23