In a survey of 2230 u. s. adults, 1272 think that air travel is much more reliable than taking cruises. construct a 95% confidence interval for the population proportion of u. s. adults who think that air travel is much more reliable than taking cruises.

(0.5499, 0.5909)

Step-by-step explanation:

Given that in a survey of  2230 U.S. adults, 1272 think that air travel is much more reliable than taking cruises.

Sample proportion p =

Standard error of proportion

We can use z critical value as sample size is very large

For 95% z critical is 1.96

Margin of error = 1.96*(0.0104)

= 0.02055

Confidence interval = p-margin of error, p + margin of error

=

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

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