Data and Statistics Flashcards
What is nominal data?
Regards categories and frequencies of occurrence
What is ordinal data?
data which involves the use of a scale (order or ranking)
What is interval data?
data which is s specific measurement or score
what is a descriptive statistic?
describes the data collected
What are examples of central tendency?
mean, median, mode
Define central tendency?
-a way of summarising data
-should be representative of the data set
how to calculate the mean?
add all the scores then divide the sum by how many scores there were.
what is a disadvantage of using the mean?
data can be skewed if there is an outlier
what is an advantage of using the mean?
can be more representative of data
How to calculate the median?
place all values in numerical order and find the midpoint.
what is an advantage of using the median?
It is not distorted my extreme values
What is a disadvantage of using the mean?
it does not take into account each participants individual scores
How to calculate the mode?
Most frequently occurring score in a set of scores
what is the disadvantage of using the mean?
-could be more than one mode or no mode
-only suitable for summarising categories
Define measures of dispersion?
A way of summarising the data but instead indicates a spread of scores which deviate from the mean
