Measures of Center

To find the average of a set of numbers, add up all the items and divide by...

• 2
• The minimum
• The maximum
• The number of items

A data set can have more than one median?

• True
• False

Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have.
1,0,1,5,6,3,4

• 3.33
• 2.85
• 3
• 3.5

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

• 99 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 50
• A score of 91 was slightly below average.

The average amount earned by 110 juniors for a week was $35, while during the same week 90 seniors averaged $50.  What were the average earnings for that week for the combined group?

• $41.75
• $43.50
• $47.55

The table displays the frequency of scores on a 10 point quiz.  Find the median of the scores.

• 7
• 8
• 9

If the mean is 15 what is the missing number in the data
12,13,12,14,18,x

• 21
• 15
• 18
• 20

What does "mean" mean?

• average
• middle
• repeats the most
• variation

What is a the meaning for "median"?

• fair share
• middle
• repeats the most
• variation

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4