What part do you have trouble with
Answer:
2) Add 21 to both sides
Step-by-step explanation:
When solving for , our goal to isolate such that we have set equal to something.
Therefore, we want to start by adding 21 to both sides. This leaves us with and we are one step closer to isolating .
Answer:
E
Step-by-step explanation:
Confidence Interval = mean + or - error margin
Mean = 42,000, error margin = width of estimate of the parameter ÷ 2 = 175 ÷ 2 = 87.50
We can be 95% confident that the population mean is 42,000 plus or minus 87.50