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According to Apple's iTunes App Store, 630,210 active applications (apps) were available for download as of May 1, 2012. Below is a table showing monthly sub-missions of new applications to the App Store from March 2011 through April 2012 (source: 148apps.biz).
Determine the interquartile range for the submissions data.
Month SubmittedApps
2011-03 19,853
2011-04 20,025
2011-05 18,259
2011-06 20,249
2011-07 18,031
2011-08 20,687
2011-09 20,177
2011-10 20,221
2011-11 19,229
2011-12 21,691
2012-01 21,082
2012-02 19,622
2012-03 23,245
2012-04 22,795"
State hypotheses, find the test statistic and critical value, and state conclusion. (3 decimal round)
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