Statisitics Flashcards
KeyWords and Methods
Population
Everything or everyone being investigated
Sample
Collects information from part of the population
Mean
Add and divide for the mean
Mode
The one you see the most / The interval with the highest frequency
Median
The middle value
Range
Difference between the highest and lowest value
Interquartile Range
Upper quartile - Lower quartile
Outlier
The value that doesn’t fit with the rest of the data
Primary Data
Data you’ve collected yourself
Secondary Data
Data you got from another resource; book, internet etc.
Qualitative Data
Non-numeric data
Quantitative Data
Numeric data
Bias
One sided( collecting data bout ‘How many Cds are bought?’ outside a Cd shop
Census
Process of collecting information about every member of a population. Population of a country, Ratio of different genders, Number of employed people, Total number of educated people, etc.
Parameter
A numerical characteristic of a population, as distinct from a statistic of a sample.