A rectangular painting's width is 6 less than twice its length. Given that the perimeter of the painting is 84 inches, select al
2 answers:
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Answer:
The point estimate is 0.45.
The 95% error margin is 0.042 = 4.2 percentage points.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is given by:
Point estimate
We have that
So the point estimate is:
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
Error margin:
The 95% error margin is 0.042 = 4.2 percentage points.