• Fit a regression predicting Sunday circulation from Daily circulation.
• Obtain 95% confidence intervals for ?0 & ?1.
• Is Daily circulation significantly related to Sunday circulation? ?Carefully state the hypotheses you are testing here, and the test you are using.
• What proportion of the variability in Sunday circulation is accounted for by Daily circulation?
• Provide an interval estimate (based ?on a 95% level) for the true ?average Sunday circulation of newspapers ?with? a Daily circulation of 600,000.
• The particular newspaper that is being considered as a candidate for a Sunday edition has a Daily circulation of 600,000. ?Provide an interval estimate for the predicted Sunday circulation of this newspaper. How does this interval compare to the interval in part 5? ?From an intuitive point of view, what you would expect? Give reasons.
• Another? ?newspaper being considered as a candidate for a Sunday edition has a Daily circulation of 2,500,000. Provide an interval estimate for the predicted Sunday circulation of this newspaper. ?How does this interval compare to the interval in part (g)? ?What you would expect? Give reasons.

Research Methodology
Assignment #2
Date of Submission: April 7, 2016
In order to investigate the feasibility of starting a Sunday edition for a large metropolitan
newspaper, information was obtained from a sample of 34 newspapers concerning their daily
and Sunday circulations (in thousands). Here is the data set:
Newspaper
——–Baltimore Sun
Boston Globe
Boston Herald
Charlotte Observer
Chicago Sun Times
Chicago Tribune
Cincinnati Enquirer
Denver Post
Des Moines Register
Hartford Courant
Houston Chronicle
Kansas City Star
Los Angeles Daily News
Los Angeles Times
Miami Herald
Minneapolis Star Tribune
New Orleans Times-Picayune
New York Daily News
New York Times
Newsday
Omaha World Herald
Orange County Register
Pittsburgh Press
Portland Oregonian
Providence Journal-Bulletin
Rochester Democrat &amp; Chronicle
Rocky Mountain News
Sacramento Bee
San Francisco Chronicle
St. Louis Post-Dispatch
St. Paul Pioneer Press
Tampa Tribune
Washington Post

Daily
—-391.952
516.981
355.628
238.555
537.780
733.775
198.832
252.624
206.204
231.177
449.755
288.571
185.736
1164.388
444.581
412.871
272.280
781.796
1209.225
825.512
223.748
354.843
515.523
220.465
337.672
197.120
133.239
374.009
273.844
570.364
391.286
201.860
321.626
838.902

Sunday
—–488.506
798.298
235.084
299.451
559.093
1133.249
348.744
417.779
344.522
323.084
620.752
423.305
202.614
1531.527
553.479
685.975
324.241
983.240
1762.015
960.308
284.611
407.760
982.663
557.000
440.923
268.060
262.048
432.502
338.355
704.322
585.681
267.781
408.343
1165.567

Assignment Questions:
1. Fit a regression predicting Sunday circulation from Daily circulation.
2. Obtain 95% confidence intervals for ?0 &amp; ?1 .
3. Is Daily circulation significantly related to Sunday circulation? Carefully state the hypotheses
you are testing here, and the test you are using.
4. What proportion of the variability in Sunday circulation is accounted for by Daily circulation?
5. Provide an interval estimate (based on a 95% level) for the true average Sunday circulation
of newspapers with a Daily circulation of 600,000.
6. The particular newspaper that is being considered as a candidate for a Sunday edition has a
Daily circulation of 600,000. Provide an interval estimate for the predicted Sunday
circulation of this newspaper. How does this interval compare to the interval in part 5 ? From
an intuitive point of view, what you would expect? Give reasons.
7. Another
newspaper being considered as a candidate for a Sunday edition has a Daily
circulation of 2,500,000. Provide an interval estimate for the predicted Sunday circulation of
this newspaper. How does this interval compare to the interval in part (g)? What you would
expect? Give reasons.