What is the median of this data set: $1,1,5,6,20$?

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What is the median of this data set: $10,15,15,20,20,20,21$?

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What is the median of this data set: $91,99,100$?

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What is the median of this data set: $2,2,3,4,8,9$?

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$3.5$ (average of the middle ones)

What is the median of this data set: $5,5,6,8,8,8$?

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$7$ (average of the middle ones)

What is the median of this data set: $92,95,99,99$?

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$97$ (average of the middle ones)

What is the mode of this data set: $2,2,3,4,8,9$?

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$2$ (the most common one)

What is the mode of this data set: $5,5,6,8,8,8$?

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$8$ (the most common one)

What is the mode of this data set: $10,15,15,20,20,20,21$?

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$20$ (the most common one)

What is the mean of this data set: $2,2,2,3$?

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$\dfrac{2+2+2+3}{4} = 2.25$

What is the mean of this data set: $1,5$?

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What is the mean of this data set: $10,12,17$?

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$\dfrac{10+12+17}{3} = 13$