Question 1109592: Express the confidence interval 50.6%±7.7% in interval form. AND
Express the confidence interval (673.1,833.3) in the form of ¯x±ME that x is(xbar)
i cant figure out the forms they want converted.
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! 0.506+0.077=0.583
0.506-0.077=0.429
(0.429, 0.583).
Probably wanted in decimal form, which is usually the case for percentages. One adds the interval to the point estimate (the number on the left) for the right side of the interval and one subtracts the interval from the point estimate to get the left side of the interval. If you add both sides of the interval and divide by 2, you should get back the original point estimate.
673.1+833.3=1506.4
half of that is 753.2
the interval is the middle +/- something
The middle is half the sum of the two or 753.2
The +/- will be the differences between the middle and each side, and they should be equal.
753.2+/-80.1
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