chapter 3 : Quick Stats (Descriptive Statistics)

Basic Stats

1. Sum

The sum is the total you get when you add all the numbers in a dataset together.

Example:
Data: 5, 8, 12
Sum = 5 + 8 + 12 = 25

2. Count

The number of values (records) in a field โ€” usually counts non-blank entries.

 Example:
Data: 5, 10, 15 โ†’ Count = 3

 


 3. Mean (Average)

The mean (or average) is calculated by adding all the values in a dataset and then dividing by the count of values.

Formula:
Mean = (Sum of all values) รท (Number of values)

Example:
Data: 5, 8, 12
Mean = (5 + 8 + 12) รท 3 = 25 รท 3 = 8.33 (approx)


 4. Mode

The mode is the value that appears most often in a dataset. Some datasets may have no mode or multiple modes if values repeat equally often.

Example:
Data: 3, 6, 3, 9, 6, 3
Mode = 3 (because 3 appears most frequently)


 5. Minimum

The minimum is the smallest value in a dataset.

Example:
Data: 5, 8, 12
Minimum = 5


 6. Maximum

The maximum is the largest value in a dataset.

Example:
Data: 5, 8, 12
Maximum = 12