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?

Question

Mathematics

Nigel

21 May, 06:00

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?

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Answers (2)

Know the Answer?

Clarence Schneider · Answer 1

D. The game scores of season 2005 have a greater spread than the game scores of season 2006

Sarahi Carter · Answer 2

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.