A researcher believes that reading habit of newspaper is decreasing every year. In order to see the true popula proportion of people who are reading newspaper s/he collect a randomly selected people on the yearly basis. T following table gives the number of people who do not read newspaper with respect to the years. Construct a 9 confidence interval for the true population proportion difference of people who are reading newspaper in 2005 2010. (P2005 - P2015)

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USE 3 DECIMALS
A researcher believes that reading habit of newspaper is decreasing every year. In order to see the true population
proportion of people who are reading newspaper s/he collect a randomly selected people on the yearly basis. The
following table gives the number of people who do not read newspaper with respect to the years. Construct a 90 %
confidence interval for the true population proportion difference of people who are reading newspaper in 2005 and
2010. (P2005 - P2015)
2010 2005
In
1200 1000
Number of people who do not read newspaper 300 400
KOnceki
Transcribed Image Text:USE 3 DECIMALS A researcher believes that reading habit of newspaper is decreasing every year. In order to see the true population proportion of people who are reading newspaper s/he collect a randomly selected people on the yearly basis. The following table gives the number of people who do not read newspaper with respect to the years. Construct a 90 % confidence interval for the true population proportion difference of people who are reading newspaper in 2005 and 2010. (P2005 - P2015) 2010 2005 In 1200 1000 Number of people who do not read newspaper 300 400 KOnceki
Expert Solution
Step 1

From the given information,

n1=1000

n2=1200

x1=400

x2=300

Consider,

p^1=x1n1=4001000=0.4p^2=x2n2=3001200=0.25p^=x1+x2n1+n2=400+3001000+1200=0.3182

 

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