1
Q
What is probability
A
The likelihood of an event occuring
2
Q
What is random sampling
A
Choosing observations frm a sample such that, each observation in the population has an equal chance of being selected and the probability of being selected stays constant from one selection to the next when more than one observation is selected (typically ignored)
3
Q
How does one trasform an x value into a z score
A
X-μ/σ or X-M/s
4
Q
How does one trasform a z score into an x value
A
X=M+Zσ or X=M+Zs
5
Q
What is the critical value of z for a two tailed significance test with α=0.05
A
+/-1.96
