Lola needs to sign 96 invitations. Using a stopwatch that measures time to tenths of a second, it takes Lola 5.3 seconds to sign
2 answers:
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Answer:
B) The margin of error is 0.0269.
C) The confidence interval is (0.5406, 0.5944).
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:
In the poll, n=918 and x=521 who said "yes."
This means that
90% confidence level
So , z is the value of Z that has a pvalue of
, so
.
B) Identify the value of the margin of error E.
The margin of error is 0.0269.
C) construct the confidence interval.
So
The confidence interval is (0.5406, 0.5944).