Mean, Median, Mode and Range

Mean, Median, Mode and Range

Mean

• Tells you the central tendency of a data set

• Also called the average

• Add together all of the numbers, then divide by the number of numbers

Median

• The middle number in a data set

• Order all of the numbers from least to greatest

• If there is an odd number of numbers, find the middle number

• If there is an even number of numbers, find the mean of the two middle numbers

Mode

• Tells us which number occurs most often

• Find the number that repeats the most in the data set

• There can be more than one mode if multiple numbers repeat the same number of times

• There can be no mode if none of the numbers repeat

Range

• Tells us how spread out the data is

• Subtract the smallest number from the largest number

Multiple Choice

1, 2, 3, 4, 7, 7, 7
The median is

• 4
• 7
• 1
• 2

Multiple Choice

Find the median of these numbers:
4,2,7,4,3

• 2
• 5
• 7
• 4

Multiple Choice

Anh is investigating the heights of a group of students:
158cm     172cm      164cm
164cm     167cm      159cm
 What is the range of the heights?

• 13cm
• 14cm
• 164cm
• 330cm

Multiple Choice

What is the mode?

• Number happening the most
• The average
• Biggest - smallest
• The middle number

Multiple Choice

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

• 193
• 127
• 60
• 66

Multiple Choice

Paisley is a dentist. She needs to report on the average number of cavities that her patients have.
1,0,1,5,6,3,4

• 3.33
• 2.85
• 3
• 3.5

Multiple Choice

At Nicola and Ana's donut shop the number of donuts in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10

• 13
• 12
• 11
• 10