Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 28 Oct 2017 My Price 4.00

good evidence

4.66    Normal approximation  for  a  sample  proportion. A sample survey contacted an SRS of 663 registered voters in Oregon shortly after an election and asked respondents whether they had voted. Voter records

 

show that 56% of registered voters had actually voted. We will see in the next chapter that in this situation the proportion pˆ of the sample who voted has approximately the Normal distribution with mean μ = 0.56 and standard deviation σ = 0.019.

 

(a)  If the respondents answer truthfully, what is P(0.52 ≤ pˆ ≤ 0.60)? This is the probability that the statistic pˆ estimates the parameter 0.56 within plus or minus 0.04.

 

 

 

(b)   In fact, 72% of the respondents said they had voted ( pˆ = 0.72). If respondents answer truthfully, what is P( pˆ ≥ 0.72)? This probability is so small that it is good evidence that some people who did not

 

vote claimed that they did vote.

 

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Maurice Tutor
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Status NEW Posted 28 Oct 2017 08:10 AM My Price 4.00

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