QOCH.C The number of cell phones per 100 residents in countries in Europe is given in Table #1 for the year 2010. The number of cell phones per 100 residents in countries of the Americas is given in...


QOCH.C


The number of cell phones per 100 residents in countries in Europe is given in Table #1 for the year 2010.  The number of cell phones per 100 residents in countries of the Americas is given in Table #2 also for the year 2010 ("Population reference bureau," 2013).



Table #1: Number of Cell Phones per 100 Residents in Europe














































































100



76



100



130



75



84



112



84



138



133



118



134



126



188



129



93



64



128



124



122



109



121



127



152



96



63



99



95



151



147



123



95



67



67



118



125



110



115



140



115



141



77



98



102



102



112



118



118



54



23



121



126



47






Table #2: Number of Cell Phones per 100 Residents in the Americas






























































158



117



106



159



53



50



78



66



88



92



42



3



150



72



86



113



50



58



70



109



37



32



85



101



75



69



55



115



95



73



86



157



100



119



81



113



87



105



96










Let
μ1= mean number of cell phones per 100 residents in countries of Europe.  Let
μ2

= mean number of cell phones per 100 residents in countries of the Americas.  Find the 98% confidence interval for the difference in mean number of cell phones per 100 residents in Europe and the Americas.




(vii) Determine confidence interval estimate of the difference
μ1
– μ2
:




Enter lower bound value to nearest ten-thousandth, followed by < ,="" followed="">

"
μ1-μ2" for difference, followed by <, followed="" by="" upper="" bound="" value="" to="" nearest="" ten-thousandth. ="" no="" spaces="" between="" any="" characters.="" do="" not="" use="" italics,="" but="" if="" mathematically="" necessary="" use="" negative="" signs. ="" examples="" of="" correctly="" entered="">



0.0077<><>


13.1012<><>


-9.7300<><>










(viii)  Using the confidence interval, select the most correct description of the result of the survey:



A.  We estimate with 98% confidence that the sample mean number of cell phones per 100 residents in countries of Europe is anywhere from 4.3641 to 37.5276 more than the mean number of cell phones per 100 residents in countries of the Americas.





B.  We estimate with 98% confidence that the true mean number of cell phones per 100 residents in countries of Europe is anywhere from 4.3641 to 37.5276 more than the mean number of cell phones per 100 residents in countries of the Americas.





C.  We estimate with 98% confidence that the true proportion of cell phones per 100 residents in countries of Europe is anywhere from 4.3641 to 37.5276 more than the mean number of cell phones per 100 residents in countries of the Americas.





D.  We estimate with 98% confidence that the mean number of cell phones per 100 residents in countries of Europe is anywhere from 4.3641 to 37.5276 less than the mean number of cell phones per 100 residents in countries of the Americas.





Enter letter corresponding to most correct answer




Jun 02, 2022
SOLUTION.PDF

Get Answer To This Question

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here