Measures of Central Tendency and Dispersion

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

• 7
• 18
• 21
• 6

Which is the MIDDLE?

• Mean
• Median
• Mode
• Range

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

• mean
• median
• mode
• range

A data set can have more than one mode

• True
• False

If you have two numbers in the middle, you should

• add them together and divide by two
• find the number in between the two
• find the mean of the two numbers
• all of these

Find the range.
12, 5, 9, 18, 22, 25, 5

• 20
• 15
• 22
• 18

What is an outlier?

• A value that is much less or much greater than the other values in a data set.
• The difference between the upper and lower quartiles of a data set.
• The mean of the distances from each data value in a set to the mean of a set.
• The difference between the greatest and least numbers in a data set.

Find the mean.
90, 100, 95, 85, 60, 80

• 85
• 84
• 86
• 90

What is the standard deviation for the data given:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 94 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 94
• A score of 91 was slightly below average.