Statistics Measure of Central Tendency

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Let a and b be positive integers. If the mean of 6, 10, 4, 2, a and b is 5, and there is only one mode, then the mode is

• 2

• 4

• 5

• 6

The heights of five plants are (x + 1) cm,

(x + 4) cm, (x – 2) cm, (x + 8) cm and

(x – 1) cm. If the median of the heights of the plants is 9 cm, then the mean of the heights of the plants is

• 9 cm.

• 10 cm.

• 11 cm.

• 12 cm.

Which is the closest to what most people would call the "average?"

• mean

• median

• mode

• range

What is the Mode?
  22,7,22,1,7,18,18,16,6,6,7

• 7

• 18

• 21

• 6