Mathematics, 04.04.2020 10:31 hayesgenniferozslxr
The poll found that 38% of a random sample of 1012 American adults said they believe in ghosts. What is the lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts?
Answers: 3
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
.
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The poll found that 38% of a random sample of 1012 American adults said they believe in ghosts. What...
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