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Mathematics - PearsonAccess.com

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Objective 9The table shows the attendance at the last six football games of theseason at Vista High School.Date AttendanceOct. 30 225Nov. 6 218Nov. 13 207Nov. 20 230Dec. 4 242Dec. 10 478Which measure of central tendency best describes the number ofpeople who typically attend football games at Vista High School?● Each attendance number in the set occurs only once. The set ofdata has no mode.● The mean attendance at the games is equal to the average of thedata, or the sum of the attendance figures divided by thenumber of games.1600 6 266.67Notice that the attendance at the last game, 478 people, is muchgreater than the attendance at the other games. This value is anoutlier. Because the mean is affected by the outlier, it does notgive a very good representation of attendance at a typical game;it is too high.● The median attendance is the average of the two middle valueswhen the attendance numbers are listed from least to greatest.207 218 225 230 242 478The two middle values are 225 and 230, and their averageis 227.5.The median is not affected by the outlier.For this situation the median best describes the number of peoplewho typically attend a football game at Vista High School.Do you seethat . . .241

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