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storchak [24]
3 years ago
15

The mean game scores and standard deviations of four seasons of a football team are given below. Season Mean Standard Deviation

2005 19 3.5 2006 21 2.8 2007 12 1.0 2008 9 4.0 Which statement must be true?
Mathematics
2 answers:
shusha [124]3 years ago
8 0
D.The game scores of season 2005 have a greater spread than the game scores of season 2006
timurjin [86]3 years ago
7 0
To find the margin of error, multiply the z-score by the standard deviation, then divide by the square root of the sample size.The z*-score for a 90% confidence level is 1.645.The margin of error is 0.20.The confidence interval is 48.3 to 48.7.48.8 is not within the confidence interval. 
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