Mean, Median, Mode ||Bp 801T||Pharmaeasynotes||@Pharmacy

Mean
The mean is the sum of all values divided by the total number of observations.

Also known as :
Arithmetic mean
average

-Can be used appropriately with data which is normally distributed.
I.E. The spread of data is equal on each side of the midpoint.

-Giving the classical bell-shaped Curve.

-Not appropriate for use with skewed data.

Example
-On measuring the weights of 7 syrup bottle in our Medical Store we observe the following values in gm:
17,18,21,22,24,30,34

To calculate the weight of syrup bottle we use the following equation:

Step 1 Mean = Sum of all values /Total number of values

Step 2 Mean = 17+18+21+22+24+30+34 / 7

Step 3 Mean = 166/7

Step 4 Mean = 24

Median
  • Used to represent the average when data is skewed (i.e. When not normally distributed )
  • Described as the middle value
  • Half of values above and half below
Example
On measuring the weights of 7 syrup bottle in our Medical Store we observe the following values in gm:
17,18,21,22,24,30,34

Middle Value
17,18,21,22,24,30,34
Therefore, the median is 22

Mode
Less frequently used.
Important when we wish to identify the most frequently occurring values.
Literally the most commonly occurring value.

Example
Again we consider On measuring the weights of 7 syrup bottle in our Medical Store we observe the following values in gm:
17,18,21,22,24,34,34

The most commonly occurring weight
17,18,21,22,24,34,34
Therefore the mode value is 34gm.

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