HW 6.3 and Homework: Week 9 7.1 Score: 0 of 1 pt 6.3.21 Save 11 of 40 (37 comple

Question

HW 6.3 and Homework: Week 9 7.1 Score: 0 of 1 pt 6.3.21 Save 11 of 40 (37 complete) HW Score: 92.06%, 38.67 of 42 pts Assigned Media | Question Help * The table to the right shows the results of a survey in which 2560 adults from Country A, 1130 adults from Country B, and 1078 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c). Adults who say that human activity contributes to global warming Country A Country B Country c 68% 85% 95% (a) Construct a 95% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming. D(Round to three decimal places as needed.)

Explanation / Answer

The statistical software output for this problem is:

One sample proportion summary confidence interval:
p : Proportion of successes
Method: Standard-Wald

95% confidence interval results:

Hence,

95% confidence interval for adults in country A will be:

(0.662, 0.698)

Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 1740.8 2560 0.68 0.0092195445 0.66193002 0.69806998

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