Mean Median Mode

Which of the following sets of numbers has a median of 8?

• 6, 7, 8, 9, 10

• 5, 8, 8, 8, 12

• 7, 8, 9, 10, 11

• 8, 8, 8, 8, 8

Answer explanation

To find the median, arrange the numbers in order. For the set 6, 7, 8, 9, 10, the middle number is 8. The other sets either have a different middle number or an even count of numbers, making their medians not equal to 8.

What is the mean of the numbers: 9, 12, 15, 18, 21?

• 12

• 15

• 18

• 21

Answer explanation

To find the mean, add the numbers: 9 + 12 + 15 + 18 + 21 = 75. Then divide by the count of numbers (5): 75 / 5 = 15. Thus, the mean is 15.

Find the median of the following numbers: 5, 8, 12, 16, 20, 24, 28.

• 12

• 16

• 20

• 24

Answer explanation

To find the median, first arrange the numbers in order: 5, 8, 12, 16, 20, 24, 28. Since there are 7 numbers (odd), the median is the middle number, which is 16.

If the mean of a set of numbers is 50 and there are 4 numbers in the set, what is the sum of the numbers?

• 150

• 200

• 250

• 300

Answer explanation

To find the sum of the numbers, multiply the mean by the number of values: 50 (mean) x 4 (numbers) = 200. Therefore, the sum of the numbers is 200.

Which of the following sets of numbers has a mode of 6?

• 4, 5, 6, 6, 7

• 6, 6, 6, 7, 8

• 5, 6, 7, 8, 9

• 6, 7, 8, 9, 10

Answer explanation

The mode is the number that appears most frequently. In the set 6, 6, 6, 7, 8, the number 6 appears three times, making it the mode. The other sets do not have 6 appearing more than once.

What is the median?

• The number in the middle when the numbers are in order from least to greatest.

• The difference between the largest and smallest number.

• The average

• The number that appears most often.

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

• 2.
• The smallest number
• The largest number
• The number of items in the set.

The number of miles that Jenna cycled each week for a 7-week period is shown:

36, 42, 28, 52, 48, 36, 31

What is the median number of miles Jenna cycled?

• 24

• 39

• 36

• 52

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the MODE.

12,10,10,10,13,12,11,13,10

• 10

• 12

• 10 and 12

• No Mode

What is the definition of the mean?

• The average

• The middle number

• The difference between the highest and lowest numbers

• The number that occurs the most