Descriptive statistics

Question 1

What are descriptive statistics ?

Answer 1

Involved in
LOOKS AT VARIABLE SEPERATELY
- Organising
- Summarising
- Simplifying
- Presenting data.

Mean - THE AVERAGE. The su m of all values in the dataset divided by the number of values.

Mode – The most frequent value eg 56777756 – mode equals 7.

Range – Difference between largest and smallest number.

Median – middle number when values are arranged numerically.

Standard deviation (SD) – Quantifies variability or scatter. It is expressed in the same units as the data used to generate it. This is a descriptive statistic. E.g. data ranges from this… to this.

Question 2

What is standard deviation ?

Answer 2

Quantifies variability or scatter. It is expressed in the same units as the data used to generate it. This is a descriptive statistic. E.g. data ranges from this… to this.