Definition
It is also called the average
Mean
Determine the mean.
15, 16, 10, 17, 15, 17, 14, 16
15 + 16 + 10 + 17 + 15 + 17 + 14 + 16
= 120/8
= 15
Determine the mode
21, 22, 21, 23, 24, 22, 25, 21
21 = thrice
22 = twice
23 = once
24 = once
25 = once
Since, 21 is the most frequently appear number.
Mode: 21
The middle value
Determine weighted mean of the numbers.
John got 92 in Math with 3 units, 91 in Science with 3 units, and 90 in English with 3 units.
92(3) + 91(3) + 90(3) divided by 9 units
= 276 + 273 + 270 divided by 9 units
= 819/9
= 91
What is the median of this data set?
7, 5, 10, 8, 6, 9, 4
Median: 4, 5, 6, 7, 8, 9, 10
The most frequently appear number
Mode
Determine the median.
18, 22, 17, 19, 25, 21, 20
18, 22, 17, 19, 25, 21, 20
17, 18, 19, 20, 21, 22, 25
Median: 20
Find the mode of the numbers:
3, 5, 3, 6, 7, 3, 5, 8
Mode: 3
How do to compute for the mean?
Get the sum of the number and divide it of how many number it has
Determine the median.
31, 28, 34, 35, 27, 30
31, 28, 34, 35, 27, 30
27, 28, 30, 31, 34, 35
30 + 31 divided by 261/2
= 30.5
The weights (in kg) of 7 boxes are:
12, 15, 14, 13, 15, 16, 14
a) Find the mean
b) Find the median
c) Find the mode
Mean: 14.1 kg
Median: 12, 13, 14, 14, 15, 15, 16
Mode: 14 and 15
How to compute for median?
If odd, the middle value is median. If even, the average of two middle values is the mediab
Determine the mode.
7, 8, 9, 8, 7, 7, 9, 10, 8, 7
7 = four times
8 = thrice
9 = twice
10 = once
Since, 7 is the most frequently number.
Mode: 7
The following data set shows test scores:
80, 75, 85, 90, 75, 70, 80
a) Find the median
b) Find the mode
a) 70, 75, 75, 80, 80, 85, 90
Median: 80
b) 80, 75, 85, 90, 75, 70, 80
Mode: 75 and 80