Based on Zarina's work, what can be concluded?
Zarina wants to determine a confidence interval based on a
random poll she conducted about the percent of attendees
at a conference who are vegetarian She determined the
margin of error for her poll results using the equation
below
Confidence
Level (%)
95
z-score
1646
196
2 58
E = 1.96, 0.3(1 -0.3)
540
With 90% confidence, between 4% and 30% of the
attendees are vegetarian
With 90% confidence, between 26% and 34% of the
attendees are vegetarian
With 95% confidence, between 4% and 30% of the
attendees are vegetarian
With 95% confidence, between 28% and 34% of the
attendees are vegetarian
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