Intro to Mean and Median

What is the mean of the following numbers?

10, 39, 71, 39, 76, 38, 25

• 42

• 39

• 42.5

• 35.5

What measure of central tendency is calculated by adding all the values and dividing the sum by the number of values?

• Median

• Mean

• Mode

• Typical value

The mean of four numbers is 71.5. If three of the numbers are 58, 76, and 88, what is the value of the fourth number?

• 64

• 60

• 76

• 82

Find the median of the set of numbers: 21, 3, 7, 17, 19, 31, 46, 20 and 43.

• 55

• 10

• 1

• 5.5

These numbers are taken from the number of people that attended a particular church every Friday for 7 weeks: 62, 18, 39, 13, 16, 37, 25. Find the mean.

• 25

• 210

• 62

• 30

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

• 13
• 12
• 11
• 10

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

Can there be more than one mode?

• Yes
• No

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?

• 193
• 127
• 66
• 55