# Test your results against those found in the original poll and calculate a confidence interval for your proportions

Anonymous
account_balance_wallet \$10

Question description

The questions you used to conduct your poll were supposed to have come from a poll someone or some group used. In this project you test your results against those found in the original poll and calculate a confidence interval for your proportions.

Original poll questions: https://news.gallup.com/poll/1615/environment.aspx

1. How would you rate the overall quality of the environment in this country today -- as excellent, good, only fair or poor?

2. Is the seriousness of global warming? generally exaggerated/correct/underestimated?

3.With which one of these statements about the environment and the economy do you most agree -- protection of the environment should be given priority, even at the risk of curbing economic growth (or) economic growth should be given priority, even if the environment suffers to some extent?

Chem97
School: UT Austin

Here it is :)

1. How would you rate the overall quality of the environment in this country today -- as
excellent, good, only fair or poor?
n = 60
25% of the respondent rate the quality environment as good
α = 0.05
The objective of the study is to test whether majority of the nation's adults think the quality of
the environment is fair or poor.
Null Hypothesis: 𝐻0 : 𝑝 = 0.5
Alternative Hypothesis: 𝐻1 : 𝑝 > 0.5
Let the level of significance be, 𝛼 = 0.05
To test the single population proportion, we use the following z-statistic.
=

𝑝̂−𝑝
√𝑝(1−𝑝)
𝑛

...................... (1)

Since the alternative hypothesis contains the symbol ">", it is right-tailed test.
At 𝛼 = 0.05, ...

flag Report DMCA
Review

Anonymous
Thanks, good work

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors