Properties of a good measure of central tendency are:-
The median.
BLER is a good measure of CD quality, but it's very subjective.
1. accurate information 2. organized information 3. timely information 4. verifiable information 5. accessible information 6. economical information 7. useful information
Viewing the data is an easy way to see some of their characteristics such as trends, seasonality, outliers, relationship between variables (linear, quadratic, power etc).
IQ does not change with age. The average IQ is 100 so 121 would be above average. It is a measure of ability to think and learn and not based on what you have learned.
The mean may be a good measure but not if the data distribution is very skewed.
The median.
The variable, height, is a continuous variable. The mode is not a good measure of central tendency for continuous variables because you would need a very large number of observations (pupils) before you are likely to get a useful number of repeat values. The modal class may be a good measure. Provided you do not have extremely short or extremely tall pupils, the mean would probably be the best.
There is no meaningful average wen data are categorical (qualitative). Also, the arithmetic mean is not a good measure of central tendency when the data distribution is skewed.
You can use the mean to answer some statistical questions: it is a measure of the central tendency of a set of data. However, it is no good in identifying the maximum value of a set of data, for example.
Francisco Pizarro's characteristics were not very good. All I know is that he lied about everything to anyone, he had a tendency to murder, and he stole very valuable items.
A good measure of dispersion is one such that the a goodness-of-fit test shows that the observed values agree well with the expected values.
There are more than three measures. Some are better than others in some situations but not as good in other situations.
= Characteristics of a Good Questionnaire =
the good characteristics of paper
what re the characteristics of good safety gear
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