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But in this case all 4 observations are less than or equal to 10 so the mean will be less than or equal to 10. You need some observations larger than 10 but every time you add an observation larger than 10 you need to add one less than 10 to keep the median less than 10, maybe like Now try some particular numbers, maybe X = 7, Y = 8, Z = 9, W = 11. What is the mean? How can you change one number to force the mean to be larger than 10? Penny
 


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