Quantitative Data Analysis Flashcards
What is the key term for the mean, median and mode.
Measures of Central Tendency.
What are measures of central tendencies?
The mean, median and mode.
What is the mode?
The most frequently occurring value.
NOMINAL DATA
Give an advantage of using the mode.
Easy to determine.
Not affected by extreme scores.
Give a disadvantage of using the mode.
Not useful on small data sets with frequently occurring values
Could be several means.
What is the median?
The middle value of scores.
ORDINAL DATA
Give an advantage of using the median.
It is an easy calculation of the average score.
Not affected by extreme scores / skewed distribution.
Give a disadvantage of using the median.
Less sensitive than the mean.
Not useful on data sets with a small number of values - may not represent the typical score.
What is the mean?
The arithmetic average.
INTERVAL / RATIO LEVEL DATA
Give an advantage of using the mean.
Most sensitive.
All scores in data set are used in the calculation.
Give a disadvantage of using the mean.
Can be affected by extreme values / skewed distribution of values.
What are measures of dispersion?
The spread of data:
The range, interquartile range, standard deviation.
What key term are the range, interquartile range, standard deviation examples of?
Measures of dispersion.
What is the range?
The difference between the highest and lowest value.
(subtract lowest value from highest value)
Give an advantage of using the range.
It is the simplest calculation of dispersion.
Covers the whole of the data set.
