Check the picture below.
bear in mind that, arcs get their angle measurement, from the central angle they're in.
bear in mind that, arcs get their angle measurement, from the central angle they're in.
How many gallons of pure water must be added to 10 gal of 30% salt water to make a solution that is 25% salt water?
1 answer:
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Answer:
Step-by-step explanation:
For this case we have a confidence interval given as a percent:
If we express this in terms of fraction we have this:
We know that the confidence interval for the true proportion is given by:
And thats equivalent to:
We can estimate the estimated proportion like this:
And the margin of error can be estimaed using the fact that the confidence interval is symmetrical
And then the confidence interval in the form desired is: