5 15 Saving Birds from Windows Many birds are injured or killed by flying into windows It appears that birds don t see windows Can tilting windows down so that they reflect earth rather than sky reduce bird strikes Place six win dows at the edge of a woods two vertical two tilted 20 degrees and two tilted 40 degrees During the next four months there were 53 bird strikes 31 on the vertical windows 14 on the 20 degree windows and 8 on the 40 degree windows If the tilt has no effect we expect strikes on windows with all three tilts to have equal probability Test this null hypothesis What do you conclude