Learning Through Statistics Flashcards
Where can dental data be found?
NHS dental statistics
National surveys
What is census data?
Data about the whole country. Most recent in 2021. Expensive and time consuming.
Types of sampling
Convenience sampling, simple random, stratified random, cluster, bootstrap
What is convenience sampling?
Collecting data from a non-representative sample of population.
What is simple random sampling
Everyone in the target population has an equal chance of being in the sample group.
What is stratified random sampling
Proportional sampling. Used when we want each subgroup to constitute an appropriate proportion representation in the sample.
What is a variable?
Characteristics of a population. E.g. age, sex, height etc
What is categorical data
When the answer to the question is not a number. Can be ordered or non-ordered.
What is numerical data?
Data with numbers. Can be continuous (any real value) or discrete (only finite values)
How to present categorical data?
In a frequency table, with frequency and proportion.
What is a measure of central tendency?
A value that attempts to describe a set of data by identifying the central position within that set of data. E.g. mean, median, mode
What is a measure of dispersion?
To determine how the sets are different, we look at how the data is spread out or dispersed about the mean. E.g. range, sample variance, sample standard deviation.
