Measures of Central Tendency + Dispersion Flashcards
Make standard deviation cards.
What are descriptive statistics?
The use of graphs, tables and summary statistics to identify trends and analyse sets of data.
How do we calculate mean?
Add all values, divide by how many there are.
How do we calculate mode?
We check which value within a set of numbers occurs the most frequently.
How do we calculate median?
We list all values in order from low to high and see which number is in the middle.
What are measures of central tendency?
A general a term for any measure of the average value in a set of data.
What are measures of dispersion?
A measure of spread of scores.
What is the range?
The difference between the highest value and lowest value in a set of scores.
What are standard deviations?
A value that tells us how far away scores deviate from the mean.
What does a larger standard deviation show?
A greater dispersion of data. May mean that there are some anomalies.
What does a low standard deviation imply?
Data is clustered tightly around the mean so PPTs may have responded in a similar way
