Answer: c
Step-by-step explanation:
sampling variability is the difference between the measured value of the random sample and the mean age of the population




Final answer: ⇒ 
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-Charlie
Answer:
They all look right but i'm not sure about the last one?
Step-by-step explanation:
Answer:
Step-by-step explanation:
x+y=12
x-y=18
Now eliminate the y by adding the two equations together to get
2x=30
x=15
then solve for y.
15+y=12
15-y=18
y= -3
Answer:
it should be step 2
Step-by-step explanation: